The Makita DTW1002Z Cordless 3-Speed Impact Wrench is powered by an 18V Li-ion battery (Not supplied). The DTW1002Z has a brushless motor and an electric brake, as well as forward/reverse rotation. This machine has extra-high max tightening torque and can loosen a bolt tightened to a torque of 1600Nm. Note that the 1600NM does not mean the actual tightening torque of DTW1002 in reverse rotation mode. Variable speed control is provided by the trigger whilst there is electronic 3-stage impact power selection (Hard/Medium/Soft). The compact and lightweight design of the device includes an ergonomic soft grip and twin LED job light.