39-Inch (1m) non-contact current detector (up to 1000A)^Non-contact detection of AC current from 200mA to 1000A^Ideal for use on shielded wires or conduit behind walls, metal circuit breaker or junction boxes^Telescoping probe extends to 36-Inch (0.9m) with reach distance of 39-Inch (1m)^For use on 50/60Hz circuits