Bside RJ45 Tester Anti-Interference LAN Tester Telephone Wire N Network cable line tester anti-interference line finder Features: 1. Wire tracing for RJ45, RJ11 telephone line and other metal wire in low electricity. 2.It is a neceary testing tool for telecommunication engineering, wiring engineering and network maintenance person. 3.Multi-functional handheld cable testing tool that is so easy for using. 4.Help to test line level, positive and negative polarity. 5.It can use for status of telephone line checking:Test the working status of telephone line (idle, ringing, and off-hook) and judge TIP and RING line Description: 1.High precision and work efficiently. 2.Wide range of applications with reinforced cable types and multiple functions. 3.Check the cable continuity function, a complete detection of the network cablesequence, short circuit, circuit, wrong, reverse. The package includes: 1. Receiver *1 2. Transmitter*1 3. English manual *1 4. RJ11 line*1 5.RJ45 line*1