1. Functions:
1) Trace telephone wire/LAN cable
2) Trace wire in electrical system
3) Verify LAN cable condition
4) Continuity test
5) Low battery indication
6) Bright white LED flash light
2. Cable assignment test:
Open, short and cross of LAN cable, 2-wire (RJ11)/4-wire (RJ45) telephone cable
3. Cable state testing (2-wire):
1) Line DC detecting, anode, and cathode determination
2) Ringing signal detecting
3) Open, short, and cross test

