AC Voltage detector detects AC voltage without making contact. Sensitivity, from 30 to 600 volts AC. Light flashes and beeper chirps when AC voltage is present. Flashes and beeps faster as AC voltage is approached. Pocket sized. LED Mini flashlight. Rugged impact resistant case. Dual color flashing tip. CAT III and CAT IV rated. 5 Year warranty. Tests for AC voltage on: outlets, light bulb sockets, extension cords, appliances, power tools, circuit breakers, AC motors, video surveillance camera power, telephone and cablevision, light switches, house trailer siding, detects power line voltage: 120, 220, 480 and 600 VAC, detects control voltage: 12 and 24 VAC, identify "hot" side of AC receptacles, find and trace electrically "live" wires or objects inside walls, determine if metal surfaces are "live" or "ground", detect presence of high voltage electric fields, detect "ringing" telephone lines.