Klein Tools Non-Contact Voltage Tester detects standard voltage in cables, cords, circuit breakers, lighting fixtures, switches, non tamper-resistant outlets and wires. A bright green LED indicates the tester is powered on. It changes to red and an audible tone sounds when voltage is detected.Voltage Tester provides non-contact detection of voltage in cables, cords, circuit breakers, lighting fixtures, switches, non tamper-resistant outlets and wiresVolt Pen with high intensity, bright green LED indicates the tester is powered onWhen voltage is detected, a high intensity, bright red LED illuminates and an audible tone will sound50 to 1000V AC power operating range allows broad applicationAuto power-off feature conserves and extends battery lifeCAT IV 1000V safety ratingLightweight compact design with a convenient clip to fit securely in your pocketProduct not recommended for testing tamper-resistant outlets; use Cat. Nos. NCVT-2P or NCVT-3P in low voltage modeIncludes instructions and 2 x AAA 1.5 volt batteries6.6-Foot (2 m) drop protectionLightweight compact design with a convenient clip to fit securely in your pocketIncludes instructions and 2 x AAA 1.5-Volt batteries6.6 ft. (2 m) drop protectionConforms to CE requirements