Features: • 9 Different Tone Mode(Adjustable) • Continuity Test • Low Battery Display • Earphone Function • Volume Adjustment • Illumination, The wire can be tracked directly in connection with Ethernet service, router, and PC terminal, Validate and troubleshoot wiring on RJ11/RJ45 cables, Coaxial cable, USB cable, IEEE 1394 cable, Test cable status for continuity, shorts, opens,miswired, crossover, 9 different tones selection for convenience use under different environment condition