The KLEIN TOOLS® dual-range noncontact voltage tester automatically detects low voltage and standard voltage. A bright green LED shows the tester is working and also functions as a work light. The light flashes red and 2 distinct warning tones sound when either low or standard voltage is detected. Features digitally controlled On/Off button, auto power-off, and low-battery indicator. Lightweight, durable polycarbonate plastic resin construction with convenient pocket clip. 9.8 ft. (3m) drop protection. • Frequency range: 50 to 500 Hz • Pollution degree: 2 • Voltage range: 12V to 1000V AC • Size: 5.5"L x .72"W x 1"H (140mm x 18mm x 25mm) • Safety rating: CAT IV 1000V. Conforms to CE Requirements.