* 1. Trace telephone wire/LAN cable * 2. Trace wire in electrical system 3. Verify LAN cable condition * 4. Continuity test * 5. DC level testing function. * 6. Bright white LED flash lightDescription:1. Find wire on all types of connected operating Ethernet switch /Router/PC terminal.2. Rapidly find the target wire from among plenty of telephone wires . 3. Rapidly find the target wire from among plenty of network wires.4. It can take place of cable tester.5. 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.