100% brand new and high qualityLAN / Network Cable Tester and USB Cable TesterIt can test cable as follow:USB(A/A), USB(A/B), BNC 10Base-T,100Base-Tx,1000Base-Tx,Token Ring, AT&T258A,Coxial,EIA/TIA568A/568B and RJ11/RJ12 modular cableYou can use connect cable if you want to test BNC,Coaxial,RCA modular cables, if you want to test cable installed far away either on patch panel or wall plate which can use the Remote terminator.The LAN/USB cable tester tests RJ11/RJ12 cable please use the appropriate adapors and follow the above procedure, so you can use it very easy and correctCompact and light weightPower LED indicatorPowered by :9V Battery (Not include)Mode : Auto Mode and Manual ModeDimensions: 13.3 x 6.7 x 3 cmAttention: --this tester should not be used to test any electrified product, or it would be damagedอ่านเพิ่มเติม