The Habotest non-contact voltage (NCV) and phase detector provides precise measurement and safe use. Equipped with LCD and sensitivity adjustment button - it is very convenient to use. It offers breakpoint checking, as well as active and inactive cable detection, and automatically shuts off after 3 minutes of inactivity. The built-in LED flashlight will make your work easier. The device is powered by 2 AAA 1.5V batteries.