Amprobe AT-6020 wire tracer is a new and revolutionary instrument, which traces energized and de-energized wires, as well as identifies breakers and fuses with extreme accuracy. Amprobe AT-6020 uses four tracing modes: quick scan wire tracing, precision wire tracing, breaker identification and non-contact voltage detection. Key Features: Quick Scan Wire Tracing for fast wire detection from a longer distance Precision Wire Tracing for accurate wire or fault location behind wall, floors and ceilings Breaker Identification with automatic sensitivity adjustment for easy location Non-Contact Voltage Detection to identify energized circuits