The Volt Stick AC voltage detector has a 220 to 230V testing range and can be used to locate breaks in cables, detects blown fuses inside plugs or fuse holders. It can also distinguish between live and neutral wires in both single and three-phase supplies, identify voltage-carrying cables in junction boxes and locate defective in-series light bulbs. * Extremely compact, styled in the format of a large pen * The nylon tip of the unit glows red when a voltage is detected * Due to the unique design of the detector there is no need for current to be flowing or contact to be made with the circuit to activate the unit * Red indicator display * -20°C to +50°C operating temperature range * Size 145mm x 18mm x 20mm * Weight 35g * Powered by 2x AAA cells (supplied)