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With the Futech VT3500 voltage tester, you quickly and safely verify whether alternating voltage is present on your electrical installations. Thanks to non-contact detection, you identify ac voltages from 12V to 1000V in sensitive mode and 48V to 1000V in standard mode without stripping or puncturing wire insulation. When live voltage is detected, the device alerts you instantly with a bright led light and an audible beep. Rated cat III 1000V and cat IV 600V, it allows you to test sockets, switches, and junction boxes with total confidence. The built-in led flashlight also ensures clear visibility when working inside dark electrical panels and cable ducts.