LotFancy Non-Contact Voltage Detector Electric Tester Pen with LED Light, Check Range 90-1000V AC (Battery NOT Included) Detect AC Voltage - Helps to distinguish the earth wire and live wire of 90-1000V AC power supplier and alerts you of the high intense radiation from powered home appliances Safe and Reliable - CE Approved, Non-contact CAT III voltage tester gives you a warning red light and Beep sound when the high voltage or intense electric radiation is detected Handy LED Flashlight - Integrated bright white led light can be used as a torch at night or illuminate the dark /dim working environment Auto Power Off - Electric tester pen will automatically shut down within 5 minutes if there is no operation; LED light is optionally turned on, saving battery power Portable Voltage Pen - Lightweight and convenient pocket clip makes the voltage detector an ideal electrical tester tool for electricians or daily-use safety tool