This instrument is a multi-functional handheld cable testing tool. It has wide application with reinforced cable types and multiple functions. It is a necessary testing tool for telecommunication engineering, wiring engineering and network maintenance person. Specifications: Work Temperature: 040°C，the maximum 80% relative humidity(no coagulation) Storage Temperature: -1050°C, the maximum 80% relative humidity [no coagulation, no battery] Altitude: ＜2000 meters Anti-explosion Rating: IP40 Distance of Sending Signal: 100 meters Battery(NOT Included): Emitter: 1 * 6F22/9V Battery; Receiver: 1 * 6F22/9V Battery Emitter Size: 12.6 * 6.4 * 3cm / 4.96 * 2.52 * 1.2in Receiver Size: 20.5 * 4 * 3cm / 8.07 * 1.57 * 1.2in Emitter Weight: 90g / 3.2oz Receiver Weight: 76g / 2.66oz Package Size: 22 * 10.5 * 3.5cm / 8.66 * 4.13 * 1.4in Package Weight: 240g / 8.48oz Package List: 1 * Emitter 1 * Receiver 1 * Clip Adapter Cable 1 * RJ45 Cable 1 * User Manual (English)