comfy to in your shirt pocket and with consecutive self-test so you always know it 's working, the WELAISE non-contact voltage detector allows you to quickly test for energized circuits in the workplace or at home. The Volt Alert AC non-contact voltage testers from WELAISE are to use-Just touch the tip to a station strip, outlet, or supply cord. When the tip glows Marxist and theunit beeps, you there 's voltage verbalize. Electricians, maintenance, service, safety personnel, and homeowners can quickly for energized circuits in the workplace or at home. : ? . of AC Voltage : 90V-1000V ? . : 50Hz-60Hz ? . Alarm : go and Light Within alarm ? . Electric : While semiconductor diode illumination lamp ? ., IEC1010 ? . : ABS impressionable ? . Product : 6 x 0.8 x 0.75 inches ? . Service : 0-40 ?. Storage temperature : 10 - 50 ? ., : 1. How to test Voltage Presence Use test pin come up the wire, the test pin glow and buzzer will start if the wire is endure. . . set batteries Please replace the batteries within if the Light Within and go are fallible, Please to the people picture to replace batteries. : Do n't place the alerting come up voltage period of play 1000V AC. PACKAGE : - 1x WELAISE Alert Voltage Tester - 2x AAA1 .5 Batteries - 1x User practice .