This instrument is a handheld cable test tool. Cable applicable types of enhanced functions more applicable to a wider range. It is a necessary test tool for telecommunications engineers,cabling engineers, network maintenance personnel, etc. Features: Anti-interference Digital Cable ScanningAdopting advanced digital cable scanning technology, anti-interference, noiseless, high sensitivity, stronger and more stable than ordinary analog signal. The Ethernet Cable Tester can be used in all kinds of POE switches, and it supports 60V withstand voltage, which is more compatible. This instrument is suitable for RJ45 interface network cables, receiver sensitivity adjustable. Length Measurement/Fault Distance LocationFY8176 Network Tester use TDR (Time Domain Reflectometry) technology to measure the length and fault point of network cable/telephone cable/BNC coaxial cable without calibration, fast response, high accuracy, wide range, measuring distance up to 400m/1312ft, support length unit ft/m switching. Note: Must be measured in open circuit. Wire Map Function The Network Cable Tester can test the physical connection status of the test network cable, such as line sequence, open, short, wrong pair, reverse connection, etc. Humanized DesignThe transmitter of the Ethernet tester is equipped with a full view 2.5 inch color screen that can be clearly read even in a dark environment, with soft rubber wrapping on the outside for a comfortable feel and 2m drop conservation. The receiver is equipped with a flashlight for easy operation in the dark. The package is equipped with a cloth pouch, easy to store and carry. Battery Undervoltage AlertTransmitter undervoltage prompt: when the transmitter battery voltage is lower than the working voltage, the display will show the battery symbol, please replace the battery in time. Receiver battery voltage indication: When the indicator light on the receiver becomes dark or the sound of the search line becomes small, please replace the battery in time. Specifications: Model: FY8176 Operating Temperature: 0~40maximum 80% relative humidity(no-condensing) Storage Temperature: -10~50maximum 80% relative humidity(no-condensing,without battery) Altitude: 300m POE: 60V voltage Flashlight: Battery: Transmitter: 3 * 1.5V AAA Battery(not included); Receiver: 3 * 1.5V AAA Battery(not included) Material: ABS Transmitter Size: 144 * 74 * 31 mm / 5.67 * 2.91 * 1.22 inch Receiver Size: 198 * 43 * 32 mm / 7.79 * 1.69 * 1.26 inch Transmitter Weight: 167g / 5.89oz Receiver Weight: 110g / 3.88oz Package Size: 22.8 * 14.3 * 5.4 cm / 8.98 * 5.63 * 2.12 inch Package Weight: 477g / 16.82oz Package List: 1 * Transmitter 1 * Receiver 1 * RJ45 Adapter Cable 1 * Cloth Bag 1 * User Manual (English)