Compact pen-type voltage detector with pocket clip and impact resistant ABS case. Easy to use, just place the white tip where you wish to detect voltage. If voltage is detected a red LED light will show with an audible alarm. Can be used to detect voltage in household appliances or electronic equipment, etc. AC voltage test: non-contact from 90V AC to 1000V AC. Visual red LED alarm and audible 90dBA alarm. LED light for voltage testing in dark areas. Supplied with batteries.