Features: Can be used for: telecommunication engineer, wiring engineer and network maintenance engineer, etc.Suitable for directly hunting for cables with RJ45 connectors, telephone wires with RJ11 connectors.Cable sorting is a process of detecting physical connections in a cable like open circuit, short circuit, wrong circuit and reversed circuit.Use the emitter to detect line level or positive and negative electrode.Two ways to detect connected states of circuits.Specifications: Work Temperature:0~40,the maximum 80% relatively humidity (no coagulation)Storage Temperature:-10~50, the maximum 80% relatively humidity (no coagulation,no battery)Elevation: 2000 metersType of Anti-explosion: IP 40Distance of Sending Signal: 3000 metersBattery: 3x1.5V/AAA (Emitter), 1x6F22/9V (Receiver)(Battery not included)Item Color: GreenRJ45 Cable Length:16.8cm/6.6inWeight: Approx.360g/12.7ozPackage list:1 * Emitter (Battery is not included.)1 * Receiver (Battery is not included.) 1 * crocodile clip test line1 * user manual1 * RJ45 cable (random color)1 * cloth pouch1 * Earphone.