Noncontact detection of voltage in cables, cords, circuit breakers, lighting fixtures, outlets, and wires. 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. 50 to 1000V/AC power operating range allows broad application. Lightweight compact design with a convenient clip to fit securely in your pocket. Includes: Insert card with integrated owner's manual, and (2) "AAA" 1.5V batteries.