Voltage Tester provides non-contact detection of voltage in cables, cords, circuit breakers, lighting fixtures, switches, outlets and wires. Volt Pen with high intensity, bright green LED that indicates the tester is operational and aids in illuminating the workplace. When voltage is detected, a high intensity, bright red LED illuminates and a warning tone sounds. Discreet 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 safety rating provides expanded operation and protection. 50 to 1000 Volt AC power operating range allows broad application.