EXTECH DV20: AC Voltage Detector/Flashlight Features: Non-Contact Detection of AC Voltage from 100VAC to 600VAC Rugged, double molded case Suitable for outlets or against wire insulation testing Red LED light indicator Built-in bright flashlight with ON/OFF button Specifications: Voltage Sensitivity: 100V to 600V AC Bandwidth: 50/60Hz Detection distance: 0.2 " Operating Temperature: 32 to 122F (0 to 50C) The DV20 is a pocket-sized non-contact voltage detector designed for quick voltage checks on live wires before testing. Other features of this detector is its LED flashlight for illuminating dimly lit areas, rugged double molded housing, and CAT III-600V safety rating. Designed for use on 50/60 Hz circuits. Comes with two AAA batteries and user guide.