Features and Benefits: Electric brake Variable speed control by trigger Forward/reverse rotation LED job light Brushless motor Compact design with overall length of 147mm Phosphorescent bumper Ergonomic soft grip Equipped with battery protection circuit: designed to protect the battery from damages due to overdischarge, high temperature or overload current. Battery fuel gauge Reverse rotation auto stop mode: This mode works only with pulling the trigger fully in counter-clockwise rotation. When the bolt/nut gets loosened enough, the tool stops the impact and rotation in 0.2 seconds. Technical Specification: Nut Busting Torque: 400 Nm Voltage: 18 v Driving Shank: 1/2" Square Blows per Minute (Hi/Med/Low) - ipm: 0 - 3500 / 0 - 2600 / 0 - 1800 ipm ipm Standard Bolt: M10-M20 High Tensile Bolt: M10-M16 No Load Speed (hard/med/soft): 0-2800 / 2100 / 1600 rpm Max Fastening Torque: 280 Nm Vibration Fastening Bolt: 11.5 m/sec² Vibration K factor: 1.5 m/sec² Net weight: 1.7 kg NB: BATTERY,