Features: 1. Suitable for household and electrical industry. 2. Ideal for testing power cables, circuit breakers, wall outlets, junction boxes, fuses, etc. 3. Simply press the button and the white LED light will stay on when there is no voltage. 4. The "beep" and flashing red LED indicate the existence of voltage. 5. Complete insulation with no exposed metal or conductive parts. 6. Long service life and low power consumption. 7. compact structure, safe and convenient to carry. Specification: Measuring voltage: AC 60V to AC 1000V. Operating temperature: - 10 to 50 Storage temperature: - 10 to 50 Operating humidity: 80% Pollution index: 2 Cleaning method: wipe with a damp cloth Operating power: 2 x No. 7 batteries (not included). Package list: 1 * Voltage Test Pen