Verify presence of voltage from 30 V AC to 122,000 V AC (122 kV) in transmission lines, power distribution equipment, down power lines, fuses, and load break connectors Easy to use! Push one button to turn the unit on, another to select low or high range setting. The unit flashes and beeps with increasing frequency as it nears a source of electricity, leaving no doubt whether the source is live or not. Has a lower voltage setting for checking voltage presence in breaker panels, breakers, power outlets and wiring MSHA certified and intrinsically safe PPE gloves? No problem! Push button functionality allows for ease of use Visual and audible voltage indication Self-test verifies instrument works properly Ergonomic design with a convenient handle Drop-proof up to 6' (1.8 m)