Detects IntelliTone digital signals on active networks and 500 to 1,200Hz analog signals on inactive networks to locate, trace, and isolate copper cabling Identifies detected signals audibly and with eight LEDs that light successively as the signal strength increases for prompt isolation of a single cable within a bundle Sync LED shows battery strength at power-up and confirms reception of IntelliTone signals Available with a cable map function for validating RJ11 and RJ45 connectors by testing continuity and finding wiring faults on all four pairs of UTP and STP twisted pair cabling Turns off automatically after one hour of inactivity