This Extech Telescoping Detector can identify any AC current up to 1000A, even in extremely hard-to-reach areas. DA50: Telescoping AC Current Detector 39" (1m) Non-Contact current detector (up to 1000A) Features: 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" (0.9m) with reach distance of 39" (1m) For use on 50/60Hz circuits Red LED light indicator and switch-controlled ON/OFF Audible beeper Sensitivity adjustment increases or reduces sensor trigger threshold DA50 Extech Multimeter Voltage Detecto ÁÑŵÔÁÔàµÍÃì