Voltage Tester, Dr.meter Non Contact Voltage Detector Pen 90-1000V AC Inductive Multi-meter Volt Meter with LED Flashlight/Auto Power Off Detect AC Voltage: Helps to distinguish the neutral wire and live wire of 90-1000VAC power supplier and its power radiation strength Handy LED flashlight for working in dark environment "Beep" sound, it also gives a warning green light and audible when you test a USB charging socket Safe and Reliable: A non-contact CAT IV voltage tester with an integrated torch avoids potential shocking experience when testing dark areas or at night. Auto Power Off: Automatically shut down within 5 minutes if no operation to conserve and extend battery life Electricians, maintenance, service, safety personnel, and homeowners can quickly test for energized Durable and Convenient: Lightweight, durable construction with convenient pocket clip, a perfect handy tool for electricians or daily use Don&#039;t use the detector if it is broken or can&#039;t work properly Don&#039;t use the detector to test objects exceeds voltage detection range 30V(AC) above has potential electiric shock risk.Be sure to take extra care when opearting Working voltage: 2 x 1.5V AAA battery(Not included) Storage temperature environment: 10 - 50, &lt; 95%RH Test Voltage Range: 90 - 1000 VAC Off quiescent current  4 uA Frequency Range: 50 to 500 Hz Safety Rating : CAT II 1000v Material: ABS Plastic Color: Orange