Motor Type: Brushless. 1 x Cordless Impact Wrench. Wrench Chuck：1/2". 2PCS 3Ah Li-ion Batteries: Double batteries can last for 3-4 hours (each 1.5-2h). Torque: 680 N.m. Forward / Reverse Button: Enables easily change rotating direction,can be used for tightening or loosening nuts and bolts.