Multi-function, small and portable wire rope measuring instrument, small in size, convenient and perfect to carry with you The cable tester tester can help you quickly find the required line pairs among many. Compatible with RJ45 network cable terminal, RJ11 telephone line terminal, which can test other metal wires through adapter Cable check Tester measuring cable, detecting cable level, positive and negative polarity, we test a positive and negative polarity by the transmitter Tracker Wire, surge protection, data maintenance, stable performance. For engineering telephone networks, computer networks or other networks using metal wire Toner Ethernet LAN Network Tester Tester tests network cable status, such as open circuit, short circuit, open circuit, cable type for improvement, wrong connection and opposite connection Description Cable tester, cable level detection, positive and negative polarity, compatible with RJ45 network cable terminal, RJ11 telephone line terminal. Features Scooter nylon hook -Blue color. -Material: ABS plastic. -Size: 2.36x4.96inch; 8.07x1.57inch. Storage temperature: -10~500, maximum relative humidity 80% (non-condensing, no battery) Altitude: <2000m Explosion type: IP40 Distance of signal transmitting: about 300m