Non-contact voltage tester with sound and red glowing test tip, sensitivity indication at approximately 4 mm distance from a conductor at 230 / 110 V AC. The Volt Stick is a testing instrument that indicates alternating voltage in cables, sockets, switches, etc., without metallic contact. No current flow is required for this. Due to the design of the Volt Stick, safe testing for the presence of alternating voltage is ensured.