The Faithfull Voltage Detector Stick is a non-contact AC voltage detector for detecting 5-1000V AC voltage. It is ideal for testing sockets and wires, and for detecting break points in a live wire. When AC voltage is detected, the indicator LED will flash red and the built-in buzzer will sound short beeps. The rotary power switch can be used to adjust the unit's detection sensitivity and an illumination function is provided for use in dark places. The detector's LED will flash red periodically to indicate there is sufficient battery power left. The casing features a pocket clip to help keep the unit close to hand. Supplied with batteries and user manual. Specification: Voltage Detecting Range: 5-1000V AC Frequency Range: 50~400Hz Safety Category: CAT IV 1000V Power: 2 x 1.5V AAA batteries (supplied) Size: 154 x 32 x 28mm Weight: approx. 50g (including batteries)