Non Contact Voltage Detectors, Battery, 1000 V ORS NASCO cooler operation) and helps maintain cooler operation) and helps maintain electrode diameter at the point of the arc Contains a precise formulated blend of carbon and graphite and other films Sealed ties and adjustable neck straps are strong and provide a durable and cables or to find a break in a wire Patented automatic self test verifies the integrity of the unit Bright LEDs flash and audible alarm sounds if voltage is present Silent mode feature for use in quiet settings Automatically turns off after five minutes of non use to conserve battery life Use to detect voltage in outlets