KLEIN TOOLS ET50 Electronic Voltage Tester AC/DC voltage range 120 - 600V Solid state design for safety LED Display is easy to read, Low impedance to reduce false readings. Indicates voltage without a battery. Voltage indicated by lights and vibration, 9.8 ft. (3 m) drop protection. AC/DC voltage range 120 - 600V, Includes Batteries, Automatic shutoff helps save battery life