ROAD GENIE Electric Circuit Tester - Tests Multiple Voltage Settings: TA-11105 Only 4.25-inch long - can very easily store in your tool pouch or tool bag Tests multiple voltage settings - 110v, 220v, 277v and 460v - reliable and accurate Useful for: outlets, switches, fuses, sparkplugs, condensers, current, DC polarity, frequency To use - make sure only touch insulated portion - not the metal portion - insert into outlet Excellent tool when working with home electricity - requires no battery