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 will tell you the tester is working and also functions as a worklight. It changes to red and warning tones sound 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 that indicates the tester is operational and aids in illuminating the workplaceWhen voltage is detected, a high intensity, bright red LED illuminates and a warning tone soundsDiscreet digitally controlled on/off power buttonAuto power-off feature conserves and extends battery lifeMicroprocessor controlled low-battery indicator and tester shutdownCAT IV 1000-Volt safety rating provides expanded operation and protectionProduct not recommended for testing tamper-resistant outlets; use NCVT2P or NCVT3P in low voltage mode50-Volt to 1000-Volt AC power operating range allows broad applicationDurable polycarbonate plastic resin constructionLightweight 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