1、【Powerful Brushless Motor】Brushless Cordless Impact Wrench has more excellent performance and durability. Brushless Motor not just offers less noise and no sparks. but also offer the cordless wrench with longer lifespan.maximum of 350N.m of force, provides impact rate up to 2300 Rpm. 2、【Stepless Variable Speed】Equipped with stepless speed change switch, easy to adjust the speed according to your demands. To vary the working speed, simply increase or decrease pressure on the trigger, the larger the pressure added, the higher the speed is. 3、【Forward and Reverse Switching】The control switch may be set to three positions forward, reverse and lock. One click forward and reverse switching for more efficient and convenient disassembly and assembly. 4、【Loose Self-stop Function】When the screws are removed and loosened, the machine will stop rotating to prevent the screws from falling off the ground. 5、【Power Indicator Display】4000mAh large capacity battery with power indicator light for you to replace and recharge it in time. 6、【LED Lighting Light】Built in LED working light, it opens automatically when the trigger is pressed, and can provides illumination in dark spaces, more convenient to use. 7、【Ergonomic Design】Ergonomic soft rubberized anti-slip handle design, easy to grip and with comfortable hand feeling, practical and labor-saving. 8、【Efficient Heat Dissipation】Reserved several ventilation cooling holes, efficient heat dissipation, will not hot for working long time. 9、【Portable】Comes with a plastics carrying box, wear resistant and impact resistant, easy to carry, providing quick and convenient mobility and storage in a complex environment. Specifications: Battery Voltage: 21V Battery Capacity: 4.0ah Motor Type: brushless motor Rotational Speed: 0-2300RPM Impact Frequency: 0-3000SPM Torsion: 350N.m No load Torsion: 550N.m Chuck: 1/2" Material: ABS+ steel Item Size: 20 * 13 * 6.5 cm / 7.87 * 5.12 * 2.56 inch Item Weight: 1042g / 36.75oz 1 x Electric Wrench 2 x Battery 1 x Socket 22mm 1 x Strap 1 x Rubber Ring 1 x Fixing Rod 1 x Toolbox 1 x User Manual