1Support: This is Ethernet cable tester, support for cat8 cat7 cat6e cat5 cable, cat6 tester and Ethernet port test adaptive 10 100 1000 Base T, compatible with high speed. 2POE Network Cable Tester: Test POE network port in the operating state of high power POE power switch, you do not have to worry about the sudden tester failure due to the power threshold. 3Good Compatibility: The tester is a network cable tester with good compatibility and requires two AAA batteries (without). 4Multipurpose: Not only is it a higher rate gigabit POE tester, but also QC single side RJ45 connector testing is its biggest feature that distinguishes it from other common testers. 5Features: Check the quality of each RJ45 connection end and RJ11 interface (QC single sided test RJ45 RJ11 connector). It can help you better crimp network cables and telephone cables.