brushless motor: brushless motor technology provides up to 60% more runtime, 80% more power and generates 60% less noise than traditional brush motors. it requires little maintenance, high performance and guarantees optimal performance and extended operating time. (replacement battery asin: b09yrcpn63) highly efficient work: cordless shock debolter has three speeds up to 2,400 rpm, saves time and energy, known for working on car wheels, automotive s and construction projects, up to 700 m16 can be tightened at full load. intelligent screwing technology: impact driver stops working when the nut reaches the edge of the screw to prevent the nut from falling off. stable structure and anvil type: heavy duty die-cast gearbox increases durability. a durable 1/2" anvil with friction ring ensures quick and easy socket changes. enhanced ibility: the integrated led work light illuminates the work area without additional light source. easy to carry ambidextrous belt hook allows easy carrying on both sides for extra adjustment. box contents: 1 x 20v brushless impact wrench, 4 x 1/2 inch impact sockets (10/13/19/21/mm), 1 x cylindrical pin, 1 x o-ring, 1 x belt hook, 1 x 4000mah li-ion battery, 1 x 2a charger, 1 x heavy duty carrying case, 1 x user manual.