Description: 1.100% brand new and high quality 2. Professional and safe tools for informants 3. Very suitable for installation, debugging and maintenance of telephone lines and other wires or cables including sender (MS6812-T) and receiver (MS6812-R) 4. Detect the continuity of the cable or wire in the case of the edge layer. Trace the cable or wire and diagnose the breakpoint. 5. Identify the status (clear, ringing, busy) in the work phone line. The main parameters: Audio signal: 1.5kHZ Receiving frequency range: 100HZ-300kHZ Battery supply: 9V(6F22)1 Size: receiving end 2384326mm transmitting end 1453525 Weight: 106g at the receiving end, 114g at the transmitting end, about 220g. Shell color: green Product Features: 1. This set of tools can be used for the installation, inspection and maintenance of various cable lines, and for telephone lines, it can judge the various states of the telephone lines at work, which is more convenient for the installation, debugging and maintenance of telephone lines. 2. When it works, you don't need to damage the insulation layer of the cable. This set of tools includes transmitter (MS6812-T) and receiver (MS6812-R) Notice: AC test is not allowed Package Include : 1 x Transmitter 1 x Receiver 1 x English manual 1 x Cloth bag (black)