Panasonic EY75A1LS2G Cordless Impact Driver Kit with Dual Voltage Technology 18-volt Battery Pack Includes 2-4.2Ah Lithium Ion Battery, Charger and Carrying Case 4.2Ah Li-ion Battery Dual Voltage Technology - 14.4V / 18V Water and Dust Resistance High Power (1,370 in.lbs.) 1/4-Inch Hex quick connect chuck