Led tester

Buy 0-300V Output LED Tester LED TV Backlight Tester Multi-Function LED Strip Bead Test Tool Detector for R379.05

Buy Digital LED Tester Voltmeter LCD TV Backlight Smart Voltage Current Tester 220V for R1,337.00

Buy LED Lamp Cover Tester LED Beads Detect Repair Tool LED Strips TV Monitor Laptop for R294.66

Buy LED Display Food Salt Salinity PH Tester Pen Soil Salinity Meter Waterproof Dish Soup Salinometer... for R269.00

Buy LED Display Food Salt Salinity PH Tester Pen Soil Salinity Meter Waterproof Dis for R323.17

LCD screen tester (Sixth Edition) using a new hardware-driven solutions and software programs, the new white-green word panel, screen printing clear and beautiful. Features: 1. easy to use, the sixth edition built-in 55 kinds of LVDS LCD resolution program; 2. through the button to switch the digital display corresponding to the resolution of the value, you can point screen; 3. increase the LCD screen power supply short circuit protection, to prevent the screen line inserted into the dislocation or LCD screen power supply circuit board damage to the driver board, short circuit after the digital display screen display flashing "00", buzzer long ringing, short circuit removed to restore normal Prohibit more than ten minutes long short-circuit); 4. built a variety of standard test chart, test chart function and the role of the following description; 5. test panel comes with operating instructions, use at a glance; 6. with a key automatic baking machine mode, easy maintenance, factory assembled roasted machine; 7. plug in the external VGA cable automatically switches to an external VGA input signal display; 8. almost compatible with 95% of the 7-inch -84 inch LVDS interface LCD / LED LCD screen test; 9. General 12V LCD power supply, the current size of the screen according to the actual needs of the test; 10. to support the development of our eDP interface LCD screen adapter board to support a variety of resolution eDP interface LCD screen test. Specification: Name: LCD LED Panel Tester Support 7''-84'' LVDS Screen Panel Tester voltage selction: 3V/ 5V / 12V 1/2/4 Lamps CCFL inverter Input: 10V-30V Support: 10-22inches Power adapter: Input: 100-240V 50/60HZ Output: 12V 4A Tester size: 130 x 80 x18mm Inverter size: 120 X 40mm Power adapter size: 110 x 50 x 30mm How to use: LCD screen test support standard, high-definition full-resolution LVDS signal, built-in 12 test screen, convenient and practical. Screen switching: can switch cycle test tool built-in 12 kinds of test screen Quality switch: according to the actual display screen effect, switch to the appropriate quality Automatic switching: 12 kinds of test screen automatically cycle display VGA input interface: insert the computer VGA signal, that is displayed on the LCD screen, the tester without any switch VGA output interface: the tester can be 12 kinds of internal test screen signal through the VGA cable to another display, to determine whether the display does not light, the equivalent of a VGA signal source. Package includes: 1 x LCD LED Panel Tester 14 x most common used Lvds screen cables 1 x CCFL backlight lamp inverter 1 x 12V AC power adapter (According to the delivery countries distribute adapter.) Details pictures:

MAX30102 Heartbeat Frequency Tester Heart Rate Sensor Module Puls Detection Blo Package weight: 0.01 kg Features: - The MAX30102 is an integrated pulse oximeter and heart rate monitor bio sensor module. It integrates a red LED and an infrared LED, photo detector, optical components, and low-noise electronic circuitry with ambient light suppression. - The MAX30102 features a 1.8V power supply and a separate 5.0V power supply for internal LEDs for heart rate and blood oxygen acquisition in wearable devices, worn on the fingers, earlobe, and wrist. The standard I2C-compatible communication interface can transmit the collected values ￢ﾀﾋ￢ﾀﾋto the Arduino, KL25Z and other micro controllers for heart rate and blood oxygen calculation. - In addition, the chip can also shut down the module through software, the standby current is close to zero, and the power supply is always maintained. Because of its excellent performance, the chip is widely used in the Samsung Galaxy S series mobile phones. - Compared with the previous generation MAX30100, the chip integrates a glass cover to effectively eliminate external and internal light interference, and has the best reliable performance. The Main Parameters: LED peak wavelength: 660nm/880nm LED power supply voltage: 3.3~5V Detection signal type: light reflection signal (PPG) Output signal interface: I2C interface Communication interface voltage: 1.8~3.3V~5V (optional) Board reserved assembly hole size: 0.5 x 8.5mm Pin Description: VIN: main power input terminal 1.8-5V 3-bit pad: Select the pull-up level of the bus, depending on the pin master voltage, select 1.8v or 3_3v (this terminal contains 3.3V and above) SCL: the clock connected to the I2C bus; SDA: data connected to the I2C bus; INT: Interrupt pin of the MAX30102 chip; RD: RED LED ground terminal of MAX30102 chip, generally not connected; IRD: The IR LED ground of the MAX30102 chip is generally not connected; GND: Ground wire. Principle Description: - Light-dissolving method: measuring the pulse and blood oxygen saturation by using human tissue to cause different transmittance when the blood vessel beats; - Light source: a specific wavelength of light-emitting diode selective for oxyhemoglobin (H bO 2) and hemoglobin (Hb) in arterial blood; - The transmittance is converted into an electrical signal: the change in the volume of the arterial pulsation causes a change in the transmittance of the light. At this time, the photoelectric variator receives the reflected light from the human tissue, converts it into an electrical signal, and amplifies and outputs it. Package Included: 1 x Heartbeat Sensor Module Click here for more deals MAX30102 Heartbeat Frequency Tester Heart Rate Sensor Module Puls Detection Blo MAX30102 Heartbeat Frequency Tester Heart Rate Sensor Module Puls Detection Blo

Description: Digital LED Patent Battery Checker By 1.2v, 1.5v, 3v, 9v Silver Durable Battery Measuring tool Specification:   1. Easy, Quick, Safe,  Easily measure battery voltage and capacity left 2. It is pyactical and easy to operate,  An epochal patent battery tester 3. Used for 1.2v, 1.5v, 3v, 9v battery 4. Widely use in Ni-H battery, NiCd, Zinc Carbon, Rechargable batteries 5. Battery fit: AAA, AA, C, D, Button cell, PP3 6. LED display gives an accurate and easy battery reading for both Voltage  and Capacity 7. Measure Accurancy: 0.5v;  Resolution: 0.1v;  Voltage Test Range: 0. 2v-10.5v 8. Working Temperature and Humidity: 0 degree-40 degree, 75% 9. Storage Tempreture and Humidity: -10 degree-50 degree, 85% 10. Operation Battery: 2 x AAA1.5v 11. Size: 8.8*4.5*3.1cm(Without packing) 12. Color: Silver   Package included:   1 x Digital LED Battery Tester   Details pictures:

Buy 0-230V output LED TV backlight tester LED test tool, current and voltage display, brightne for R1,481.00

Description: 12V Acid Lead Batteries LED Indicator Battery Capacity Digital Tester Voltmeter With a shell, easy to use stand-alone or embedded in the panel on the product. Specification: Display Mode: Battery +voltage,Battery +Percentage Black wire connect negative electrode. Red wire connect positive. Work current: 5-15mA (with backlight) Energy resolution: 1% Voltmeter accuracy: 1% Using temperature range: -20 - 70℃ Operating humidity: 10 - 80% External dimension: 4.6 x 2.7 x 1.7cm /1.81 x 1.06 x 0.67in Note: This tester for Lithium and lead-acid batteries Universal,the factory default setting for 12V lead-acid battery power and voltage cycle display,If you need to test other specifications can be re-set by yourself. 1. Pull the white button on the backside for about 3s until it shows “1-U” and release it. Pull it again for 1s it shows “2-b” and release it. Pull it again for another 1s it shows “3-c” and release it. Pull it again for another 1s it shows “4-d”. 2. When it shows “1-U”, pull the white button for 3s then you can adjust the voltage admeasuring apparatus. Pull it for a longer time, the voltage goes up. Then pull it for another longer time, the voltage goes down. Do it again and again. To save and exit Automatically after the screen is twinkling. 3. When it shows “2-b”, you can change the type of battery. * 12V: 1pc 12V Lead-acid battery * 3.7V: 1pc 3.7V Lithium polymer battery * 3.2V: 1pc 3.2V Lithium iron phosphate battery * 1.2V: 1pc 1.2V NiMH battery 4.When it shows “3-c”, you can adjust the number of batteries.Please refer to the following: * 12V Lead-acid battery: 1-8pcs * 3.7V Lithium polymer battery: 2-28pcs * 3.2V Lithium iron phosphate battery: 3-32pcs * 1.2V NiMH battery: 10-70pcs 5. When it shows “4-d”, you can adjust the display mode. “V” is voltage mode. “%” is percentage mode. “V %” is voltage& percentage cycle mode. Package includes: 1 x Indicator Battery Capacity Tester Details pictures:

CCTV TESTER IPH CCTV Tester           CCTV TESTER IPH CCTV Tester IP 3.5" LCD Screen Full Angle HVGA Cable Hunting + Digital Multimeter + Optical Power Meter + TDR breakpoint + Short-Circuit Test 3.5 inch Full Angle HVGA LCD Screen IP CCTV Tester 480x320   Part No: CCTV TESTER IPH   NOTES; Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE   Features 3.5 inch Full Angle HVGA LCD Screen 480x320 LCD Brightness/Contrast/Color Saturation are adjustable Built-in 4GB SD Card 10x Digital Zoom Video Image Video Image Snap Video Record Video Play Back NTSC/PAL Signal Auto identification and display Build-in Video Signal Generator (enhancement mode) Video Signal Strength Measurement Control PTZ PTZ Data Analyst Protocol Code Capture and Display Pan/Tilt Address Scanning PTZ preset and call RS485 Communication address scan UTP Cable Test and Number Display Audio Test PING Test Ethernet port twinkle POE Voltage Measurement Ethernet link Monitoring IP Address Search Build-in LED light for night working Build in Li-battery Supports 11 Power Output to Camera DC 12V/1A Power Output Additional Functions: Cable Hunting Digital Multimeter Optical Power Meter TDR Breakpoint Short-Circuit Test

Specification: 1. Characteristics Qualcomm QC2.0/QC3.0/MTK-PE quick-charge power tester /Voltage trigger; the quick-charge mobile phone will cost at least 2000RMB-5000RMB, but how does the quick-charge factory test? Please let qualcomm QC2.0 / QC3.0 / MTK - PE Quick-charge Trigger simulate the quality test and aging test for expensive phones in mass production, and let the digital players DIY the usage and quality judgment. The product has the built-in qualcomm QC2.0 Handshake Protocol, which can simulate the qualcomm QC2.0 Protocol A and B of quite expensive high-end phones in the current market. Through sending the Handshake Protocol instruction, it can support the qualcomm QC2.0 charger and charger baby to draw the voltage and show its value, and it can also output to the USB as the aging and testing; it can also draw the fixed power adapter of 9V, 12V and 20V to supply power to the corresponding equipment; there are display screen, power intensity LED light, mode switching, fixed voltage supply, buzzer hint and USB output, so that the application is diversified, and it is the perfect equipment for both manufacturer and digital player. 2. Function A: Support the qualcomm QC3.0 and compatible with QC2.0 protocol, and long press the key to switch the different trigger function modes: 1) Output 5V/ 2A 2) Output 9V / 1.7A 3) Output 12V / 1.3A 4) Enter QC3.0 mode and press 0.2 V for increase and decrease test B: support Mediatech MTK - PE quick-charge protocol (this mode must have 10ohm the output trigger the high-voltage high-power) 3. Operating instructions 1) Function switch and data reset: long press to switch the three kinds of measuring display modes: switch among QC2.0 / QC3.0 / MTK-PE, and press for consecutive 5 times to reset the capacitance power). 2) Long press under QC2.0 mode: short press for voltage activation switch (5V / 9V / 12V/ 20V), and double click for automatic cycle activation switch. 3) Long press under QC3.0 mode: short press to minus 0.2 V, double click to plus 0.2 V, three clicks to automatically minus 0.2 V, and four click to continuously plus 0.2 V. 4) Long press under MTK - PE mode: first double click to increase the voltage, and then click to decrease the voltage, three clicks to continuously decrease the voltage, and four clicks to continuously increase the voltage; under the mode of continuous voltage increase or decrease, short press or double click will exit the continuous increase or decrease mode and enter the static trigger mode. Comment: the automatic factory test pattern is added, that is, the system has power memory under the automatic mode, and can enter the automatic quick measurement mode, improving the production test efficiency. Warm prompt: under MTK-PE function mode, D+D cable is the data connection state, and at this time, it can be used as the U disk or the common tester, so that the phone Handshake Protocol can quick charge through the tester data transfer, so if it is used as the USB tester fully, please adjust it to MTK - PE mode for normal USB tester. Notice: This equipment draws the quick charger baby that supports qualcomm QC2.0 /QC3.0 / MTK - PE Protocol with high voltage, so the output cannot be directly used as the mobile phone charge, because the ordinary cell phone supports 5V, and qualcomm voltage is 9V, 12V and 20V, so such high voltage cannot directly enter the normal mobile phone. It is disappointing to be misunderstood due to the users’ error. Please keep in mind that this is not the quick charge accelerator, but just draws the voltage of qualcomm QC3.0 products through the instrument, and determine whether it is the real qualcomm QC2.0/3.0 charger baby, so as to help people identify it or cooperate with our aging test for the manufacturer or players. This equipment can choose the alternate aging mode and manual single-voltage trigger aging mode; under the manual mode, short press the button to send 5V/9V//12V/20V quick charge protocol; if some chargers have no 12V and 20V, it means that the charger only supports 9V, and we can accurately judge whether qualcomm QC2.0 belongs to the A Protocol or B Protocol. Packge Included: 1 x QC2.0/QC3.0/MTK-PE Trigger USB Tester Detail Pictures:

Coolermaster PSU tester with on/off switch + LED status indicators + thermal control fan - for pin PSU + 4/12pin + 6/8pin PCI-e + SATA + molex + 4pin stiffy + extend load connectors, support maximum 3x load modulars

Description:   12-250V AC DC Digital Voltage Detector Tester Pen LED Light Electric Sensor Features:   1.It's perfect for home use and handy when checking holiday lights. 2.Item checks wire and tells you which is hot (fire), which is cold (ground), and incredible, No battery needed. 3.Size: 13.7 x 3 x 2cm 4.Material: Plastic + Metal 5.Test range: 12~250V AC DC   Usage:   Voltage detection 1 The final figures is the voltage value. 2 It will indicate the lower value if not reach 70%of display value of the high value. 3 Please touch the negative pole when test the voltage of DC. 4 Inductance can be used when test the item with lower than 12V voltage. 5 It must be connected to ground or the zero when test the item with the induction.   Sensor detection When detect line side by side, please increase the space between the lines or hand-hold the detected item. Break detection. Move along the phase line, when there is nothing shows in the display window, it is the breakpoint.   Package Included:   1 x Voltage Detector Pen Details pictures: 

SID-GJ2C 0-300V Output All Size LED LCD TV Backlight Tester Meter Tool Lamp Beads Board Detect Repair Tool Package contains 1 X item of the smallest listed variant.

Buy 0-400W LED Power Tester Lamp Bulb Light Test Box Voltage Power Quick Fast T for R639.00

Buy Brake Fluid Tester Moisture LED Water Compact Tool Test Indicator Pen Blue for R341.21

Intellinet Multifunction Cable Tester RJ45 (Wire Pair)Tests RJ-11 and RJ-45 • Cable type: UTP/STP/FTP, Retail Box, 2 year Limited Warranty Product Overview The Intellinet™ Multifunction cable tester with remote terminal examines RJ45, RJ11 connectors and instantly diagnose 10BaseT cabling problems while scans each wire pair to detect the flaw. The Intellinet™ Multifunction cable tester with remote terminator is compatible with 10BaseT wiring while instantly detects and diagnose problems also automatically scans each wire pair. Tester identifies problems with LEDs and Highlights • Tests RJ-11 and RJ-45 • Cable type: UTP/STP/FTP • LEDs indicate connections and faults • Tests shielded and unshielded LAN cable Features examines RJ45 connector. •Display type: LED •Fast answers: Tests RJ-11 and RJ-45 •Beige and grey •Cable type: UTP/STP/FTP •Diagnose your most common 10BaseT cabling problems •Compatible with 10BaseT, AT&T 258A & EIA/TIA 568 wiring, it automatically scans each wire pair and identifies problems with LEDs •Requires 9V battery •Weight: 182 grams

Ryobi Voltage Tester 400V (VT-400) Key Features: -For the testing of domestic wiring, automotive circuitry, electronic equipment, control panel trouble shooting etc. -Checking of AC voltages 12 - 400 Volts and DC voltages 12 ¿ 500 Volts. -The voltage level is indicated by LED¿s. -Used for polarity detection with LED¿s indicating + or ¿ DC. -Two handed operation for low impedance testing. -Conforms to IEC/EN 61243-3 for safety. Specifications: Voltage range: AC ¿ 12;50;120;230;400 DC ¿ 12;50;150;300;50 AC frequency range: 0 ¿ 100Hz Maximum measuring current: 30 mA Operating temperature: -10 to 50°C Operating humidity: Protection type: 1P4X Nett weight: 130 gr Dimensions: Product ¿ L 60 mm x W 30 mm x H 230 mm Packaged ¿ L 145 mm x W 40 mm x H 285 mm

Features: Multiple functions: alternator state check, battery state check, check before charge and overload display. 6-LED display, clearly present the alternator and battery state. Two testing clips for safe and easy operation. Small size and light weight, convenient to carry. Fit for car, motorcycle, etc., with 12V battery. Heavy duty insulated clamps. Suitable for 12V lead acid batteries, hardtop batteries, discharge batteries and maintenance free batteries. Easy and safe to use, no sparking. And it with a good chip inside, so it is not easy to get hot on the surface. Specification: LED quantity: 6 (2 red, 3 green and 1 yellow) Material of wire: 0.06 square millimeter copper Max. voltage and current: 12V 15A Length of wire: 100cm Product size:190 x 40 x 63mm Product weight: about 65g (including one clips) Package included: 1 x WHDZ VT15C 12V Car Battery Alternator Tester Detail Pictures:

Features:   Multiple functions: alternator state check, battery state check, check before charge and overload display. 6-LED display, clearly present the alternator and battery state. Two testing clips for safe and easy operation. Small size and light weight, convenient to carry. Fit for car, motorcycle, etc., with 12V battery. Heavy duty insulated clamps. Suitable for 12V lead acid batteries, hardtop batteries, discharge batteries and maintenance excelent batteries. Easy and safe to use, no sparking. And it with a good chip inside, so it is not easy to get hot on the surface. Specification:   LED quantity: 6 (2 red, 3 green and 1 yellow) Material of wire: 0.06 square millimeter copper Max. voltage and current: 12V 15A Length of wire: 100cm  Product size:190 x 40 x 63mm Product weight: about 65g (including one clips)     Package included: 1 x WHDZ VT15C 12V Car Battery Alternator Tester Detail Pictures:            

  READ SHIPPING PAGE. NO ORDERS WILL BE DISPATCHED UNLESS CORRECT SHIPPING IS PAID Linkbasic Network Cable Tester  RJ45/RJ11   Designed for testing the UTP and screens for the opens, shorts, reversals, mis-wiring and so on. The relative indicators on the main tester and the remote testing terminal will flash one by one in cycle to judge which wire is in the correct working connection, or in the incorrect order connection.If you make your own patch cables and want to test that the wires are correctly assigned, then you need this! Test your twisted pair, Straight, Crossover, Cat 5 / Cat 5e / Cat 6 / UTP cables with RJ-11 or RJ-45 connectors. Insert the battery, turn on the tester, and connect one end of the cable to the Master side and the other end to the Remote side. The lights indicate problems (if any) with wires in the cables. A very useful item for the networking enthusiast!   PRODUCT DIFFERS FROM PICTURE. PICTURE USED FOR ILLUSTRATION PURPOSES   Features & Benefits Keep your network running smoothly by testing your cables to uncover problematic shorts, open wires, crossing pairs and other wiring mishaps Use for testing your homemade Ethernet patch cables to make sure they are in working order prior to connecting to your devices Tests RJ45 cables, RJ11 telephone cables and network cables Easy to read LED display indicates problems.Hand-held for portability. Requires one 9-volt battery (not included) Used for testing RJ45 cables, RJ11 telephone cables and network cables For UTP/FTP - 4 & 2 pairs lan cable (10/100 Base-T)     View all my items. Click Here   Internet transfer, Cash Deposit, Cash on Collection.  Payment to be made in 48 Hours. NO EXCEPTIONS

Buy AC 220V LED Bead Board Lamp Dual Display Screen LCD Light Backlight Tester for R742.84

Buy DC 2.5-30V 2-Wire LED Digital Display Panel Voltmeter Electric Voltage Meter Volt Tester... for R289.00

Features: Size: Approx. 16x8.6x2.6cm/ 6.30x3.39x1.02" Open. short wire testing 9V Alkaline battery powered (Not included) Clear reading for wire status Can test RJ11/ RG45/ USB Fast speed in testing BNG terminator 25 Ohm/ 50 Ohm indications Straight or crossover indication Battery good or battery low indication LED clear indications RJ11/ RG45 are equipped with 50u" gold plating Fast reaction during rest process Max. cable length: 1000ft Package includes: 1 x 4-in-1 Network Cable Tester 1 x Carrying bag 1 x English Instruction Manual Details pictures:

Accurately differentiate diamonds from other materials | Large / small switch for testing diamonds Emits audible sounds to give accurate readings. Diamond indicator will be showed if the stone is a REAL diamond Batteries: 1 x 9v Battery (not included) 45X Illuminated LED Loupe comes with batteries included HDE is a registered trademark and is the only authorized seller of HDE branded products Important - Please read before placing an order! All our products are order on request items, and as such will take roughly 10-25 working days once payment has been recieved to be delivered. All stock is sourced from the USA, and is designed for use in the USA. If you are unsure about South African compatibility please check with us/the manufacturer before placing your order. Once your order has been processed, we will confirm the order and send you our banking details. Once paymant has been received, we will process your order accordingly. We will keep you updated during the process, and advise you each step of the way (Once the order has been confirmed, arrived at USA office, arrived at SA Customs, arrived at SA offices and despatched to customer with tracking details). Please note you will receive automatic feedback requests from BoB before the order is delivered, please wait for the order to be delivered before rating us. Pricing displayed includes all customs charges (VAT/DUTIES/PORT HEALTH etc), insurance and international shipping - there are no surprises or any extra costs when the item arrives in the country. We use a door to door courier for all our deliveries and do not use the Post Office. As all orders are placed as a special request, orders cannot be cancelled/returned once the order has been placed and confirmed. All items come with the standard warranty issued by the manufacturer in the USA. If a warranty claim needs to be submitted, the item would need to be returned to the USA. The authorized SA distributor of our products are under no obligation to honour the manufacturer's warranties or to provide after sales service.

Description: Voltage Detector Plastic Handle Electric Alert Tester Volt Test Pen Screwdriver It is a necessary tool for everybody who works with electricity, ideal for testing AC cables, circuit breakers, wall sockets, junction boxes, fuses, etc.   Features: Two function are for Test Pen & Screwdriver. Perfect for home, shop, garage, automotive, motorcycles, boats, personal watercraft, snowmobiles. Suitable for identifying live wires, broken wires and fault finding. Compact, safety, and easy to carry. This instrument is only used to judge whether the conductor is live or not. All outer surfaces are non-conductive for safety Touch the wire with the pen tip. If the LED indicator lights up, it means voltage exist. Detects voltage without metallic contact. When you test, you should press the top golden metal parts. Test Limits about 100V-500V. Colour: Blue Size: 13.2 x 2cm   Package includeds: 1 x Electric Test Pens   Details pictures:

Network Phone Cable Tracker Wire Toner Tracer Tester Specifications: Powered by DC 9V battery (for both receiver and emitter) Max working current: emitter: Signal output electric status: 8Vp-p, Signal transmission format: Muti-frequency impulse Appearance dimension: 175*42*27mm(receiver); 126*49*34 (emitter) Distance of signal transmission: >=3km Color: Orange Features: 1. Trace telephone wire/LAN cable 2. Trace wire in electrical system 3. Verify LAN cable condition 4. Continuity test 5. Low Battery Indication 6. Bright white LED flash light 7. Cable Assignment Test: Open, short and cross of LAN cable, 2 -wire (RJ11)/4-wire (RJ45) Telephone cable 8. Cable State Testing (2-wire) - Line DC detecting and anode, cathode determination - Ringing signal detecting -Open, short and cross test Main Function: 1. Cable state testing: 1) Line DC detecting and anode, cathode determinant. 2) Bell signal detecting. 3) Open, short and cross testing. 2. Volume regulate function: accord needing regulate the sound magnitude. 3. Function of speed regulating: choice speed on testing. 4. Function of speed and frequency changing: choice speed on testing, choice frequency on looking. 5. Function of the earphone: in noisy environment, earphone can be used to prevent interference from the outside. (Earphone not included) 6. Volume adjusting function: while find a wire, volume knob can be rotated for moderate level of sound. 7. Spotlight function: you can easily work as usual while putting on the light switch at night and in the dark Package: 1X Wire Tracker Emitter 1X Wire Tracker Receiver 1X RJ11 cable 1X RJ45 cable 1X Cable with crocodile clamp 2X Battery