Square drive: 1/2" No-load speed: 0-1600/0-1900/0- 2300rpm Impact rate: 0-2100/0-2500/0- 2900bpm Fastening torque: 400Nm Nut-Busting torque: 550Nm Integrated LED work light Include: 1 Pcs 20V charger(FCLI2001) Charge volts: 220-240V~50/60Hz