1Strong signal antiinterference function, it can detect more accurately and prevent errors and mistakes. 2Stable detection ability, its sensing ability is very strong, it can response quickly when detecting the situation. 3LED light display, when it detects a disconnection, the light can response quickly, making it easier to check the situation. 4Multifunction, it can perform line finding, line matching and line fault finding, which is convenient for multiple detections. 5Small in size, it is lightweight and portable, and can be easily hand-held to measure in various situations. Item Type: Line Finder Model: GM62 Material: ABS Receiver Battery: 1x9V 6F22 Battery (Battery Not Included) Transmitter Battery: 3x1.5V AAA Battery (Battery Not Included) Purpose: It is suitable for network line inspection. Finding Signal Transmission Distance: >Approx.1000m / 3280.8ft Display Mode: LED Light Environmental Working Temperature: -10~40 (14~104) Relative Humidity: 10-95%RH Storage Temperature: -20~60 (-4~140) 1 x Line Finder Transmitter(Battery Not Included) 1 x Line Finder Receiver(Battery Not Included) 1 x RJ45 Crystal Head Line 1 x RJ11 Crystal Head Line 1 x Clip Cable 1 x Headphone 1 x Manual