【4 in 1 Multi-function Tool 】 LAN cable tester, OPM, VFL and NCV combined on ONE tool. No more calls,no more costs, find and fix it by yourself. 【Accurate CAT5 CAT6 Cable Tester】NF-8508 network tester is a multifuctional tool which can do POE test, length measurement, wire locator and tests the faults of LAN network. 【Optical Power Meter Test】Connect the network cable under test to the transmitter port. The cable tracker automatically detects the fiber frequency, with the port indicator light flashing synchronously. 【Multifunctional Testing】Includes cable scanning, optical power meter, continuity testing, POE testing, QC testing, length measurement, VFL functionality, and NVC functionality. 【Must Tool for Home Using】 Non-contact voltage detecting, LED light and 1500mAh rechargeable lithium battery help you get the job done in a variety of environments. KOLSOL AT338 Network Cable Tester LAN Optical Wire Meter Power Meter Tester LCD Display Measure Length Wiremap Tester Cable Tracker