Arctic Hayes Non-Contact Voltage Detector – 12–1000V AC CAT III 1000V Double Insulated The Arctic Hayes AH12 is a non-contact voltage detector for quickly identifying live AC circuits without needing to touch the conductor. It detects voltage from 12V to 1000V AC at 50/60Hz, giving a red LED flash and an audible alarm together when voltage is present, so it's usable in both bright and low-light conditions and where background noise might make an audible-only signal easy to miss. The body is double insulated for additional protection when working near live circuits, and it's rated CAT III 1000V, the correct category for fixed electrical installations such as distribution boards, fixed wiring, motors and industrial equipment. It also includes a built-in flashlight function for checking connections in poorly lit spaces. Compact and light