FEATURES Brushless motor (safe for flammable environments). 6-10 times longer life span than Brush motors. Brushless motor does not have electromagnetic interference Extend the battery pack lifetime 2-3 times. Dormant function to save power. Battery power indication. Overloading protection. Highly efficient ventilation. Easy release slide battery pack. LED light indicator. Double injection housing. PRODUCT SPECIFICATIONS 3 Stage impact power selection. Automatic shut off power function. 1/4" (6.35mm) hex drive shank chuck. Variable speed reversible switch with electric brake. High output impact transmission. Fully metal gearbox. Ergonomic grip. Voltage DC: 18V Unload speed: 0~2700 RPM Chuck / Shaft: 1/4" (6.35mm)Hex drive Max torque: 295(400) ft-lb(NM) Weight with Li-ion battery pack: 3.04(1.38) lbs(kgs) Housing: PA6 + GF 30%