This non-contact voltage detector alerts the user to the presence of standard voltage in cables, cords, circuit breakers, lighting fixtures, switches, outlets and wires. Automatically detects and indicates voltage at a range of 90V ~ 1000V AC allowing a wide use of applications. Push button activates the high intensity orange LED indicating the tester is operational. Ideal for use in the field or at home. 2 AAA batteries (not included) provide up to 6 hours of continuous use. Warning: Always test the Detector before use and never use to test voltage more than 1000V AC.