Designed to identify the presence of AC voltage in outlets, switches, circuit breakers, fuses, wires, and cables, this voltage tester is the perfect tool for verifying low and high voltage in live circuits. This voltage tester features the following: Non-contact low voltage detection from 24-1000 VAC identifies voltage in audio systems, cables with thick insulation, and other weak electromagnetic AC signals Non-contact high voltage detection from 90-1000 VAC identifies voltage in outlets, switches, circuit breakers, electrical panels, and more Can identify live voltage in wires and cables through insulation CAT IV 1000V rating for added operation and protection LED light and beep sound indicate that voltage is detected Built-In flashlight helps you see in dark places Compact and lightweight design with built-in pocket clip allows you to carry it on the go ETL listed and CE certified Automatically shuts off after 5 minutes to preserve battery life Powered by (2) AAA batteries (included)