This Wire Tracker is a reliable tool to quickly find the pair cables among so many cables. Features: Trace wire in electrical system Trace telephone wire/LAN cable Verify LAN cable condition DC level testing function Bright white LED flashlight Find wire on all types of connected operating Ethernet switch/Router/PC terminal Rapidly find the target wire It can take place of cable tester Compare the volume of the"tout" sound and the brightness of the signal indicator, Then you can find the target wire which has the highest volume and brightest indicator. Can test RJ-45/RJ-11 Low battery indication Cable assignment test: Open, short and cross of LAN cable, 2-wire (RJ11)/4-wire (RJ45) telephone cable Cable state testing (2-wire): Line DC detecting, anode and cathode determination Ringing signal detecting Open, short, and cross test Specifications: Max. Working Current Emitter: ≤10mA Receiver: ≤30mA Signal transmission format: Multi-frequency impulse Signal output electric status: 8Vp-p Distance of signal transmission: ≤3k Volume Regulate Function: Yes Earphone for noise environment: Yes Sensitive; induction distance less than 20mm. strong anti-jamming ability Storage Temperature: -20 ~ 50°C Operating Temperature: -10 ~ 40°C Appearance dimension Emitter: 126 x 49 x 34mm Receiver: 175 x 42 x 27mm Whole set: 270 x 165 x 45mm Weight Emitter: 0.060kg Receiver: 0.072kg Whole set: 0.420kg Power Supply: DC, 9V battery Battery life: 50hrs continuous use Set Includes: 1 x Wire Tracker 1 x Emitter 1 x Receiver 2 x 9V battery 1 x earphone 1 x RJ45 network cable 1 x English Instruction Manual 1 x Toolkit 1 x Color box