Non-contact detection of voltage in cables, cords, circuit breakers, lighting fixtures, switches, outlets, and wires. High intensity, bright green LED indicates the tester is operational and aids in illuminating the workspace. When voltage is detected, a high intensity, bright red LED illuminates and a warning tone sounds. Discrete digitally controlled ON/OFF power button. Auto power-off feature conserves and extends battery life. Microprocessor controlled low-battery indicator and tester shutdown. CAT IV 1000 Volt rating provides expanded operation and protection. 50 to 1000 Volt AC power operating range allows broad application. Durable polycarbonate plastic resin construction. Lightweight compact design with a convenient clip to fit securely in your pocket. Packaage contains insert card w/ integrated owner's manual and 2 AAA 1.5 volt batteries.