• When it detects AC voltage, the detection indicator LED will flash red and the built-in buzzer will sound in short beeps • Durable ABS plastic resin casing and compact design • With pocket clip for convenient storage and access • Safe, efficient, quick and accurate testing • Variable sensitivity • Equipped with LED torch for operation in low-light conditions • Suitable for detecting whether a cable, wire or socket contains AC voltage, or use it to locate breakpoint on a live line • After adjusting the unit’s detection sensitivity to a suitable level, you can use this unit to discriminate between Live terminal and Neutral terminal on an energized AC110V power socket