Features:1. Suitable for home and electrical industry.2. Ideal for testing power cables, circuit breakers, wall sockets, junction boxes, fuses, etc.3. Just press the button and the white LED light will stay on when there is no voltage.4. "Beep" sound and red flashing LED indicate the existence of voltage.5. Complete insulation without exposed metal or conductive parts.6. Long life and low power consumption.7. Compact structure, safe and convenient to carry.Specification:Measuring voltage: AC 90V to AC 1000VOperating temperature: - 10 to 50Storage temperature: - 10 to 50Operating humidity: 80%Pollution index: 2Cleaning method: wipe with a damp clothOperating power: 2 * No. 7 batteries (not included)Package list:1 * Voltage Test PenNote:1. When the pen feels or detects the voltage, the white part of the pen will glow and buzz. It is easy to detect the fire line and know which line has the dangerous voltage.2. There is a button in the middle of the induction pencil, press it, and there is a bright LED at the tip of the pen, which can be usedas a flashlight. In the dimworking place, it is easy to complete the line test work without the help of flashlight!.