Non-contact voltage detector checks for active AC voltage in wiring raceways, extension cords, electrical outlets and load centers without touching live conductors. Features hands-free wire clip. Checks for live voltage from 50-1000V. Tester on light double-checks battery condition before testing definite. On/off position sliding pocket clip. Loud chirping and flashing light indicates live voltage. Checks for breaks in electrical cords. Uses "AAA" batteries (included).