maintenance-free brushless motor: are you still worried about the wear and tear of traditional carbon brushes, sparks and noise? this 21v cordless screwdriver is equipped with a brushless motor with torque up to 120nm, which is more stable and efficient than traditional models, without sparks and with low noise level! maintenance-free design eliminates the need to replace carbon brushes and extends service life. the motor has a 55a overload protection chip, which not only protects the equipment, but also avoids the risk of operation 20+3 to meet all scenarios: the cordless impact driver drill is equipped with 3 functions of screwing, drilling and impact drilling, which can be seamlessly switched between different materials such as plastic, wood, glass, metal and lightweight concrete with a simple rotation to meet the needs of different scenarios such as household appliance repair, furniture diy, installation wall paintings, etc. 20-speed clutch adjustment allows for precise work and avoids overstraining and damage to materials battery and quick charger: this brushless screwdriver is equipped with two 21v 4ah lithium-ion batteries, a single battery can withstand 2 hours of operation, with a 2-hour quick charge seat charger, both batteries can be used alternately, without having to worry about interruption of operation. the power display panel can indicate the power level, and you can know the remaining power at any time. the battery chip has been upgraded and includes a 60a protection card, automatic overload protection, current recovery that can be resumed after use 2 speeds - up to 2150 rpm: low speed (0-600 rpm) with higher torque for drilling and screwing in hard materials. high speed (0-2150 rpm) has lower torque but faster speed for drilling and other work on soft materials. in addition, the cordless drill is equipped with a stepless adjustable speed switch: the harder you press, the faster the speed, making it easier to control the operating speed accurately ergonomic design: (1) the cordless screwdriver is compact and weighs only 1.85 kg. (2) 13mm self-locking metal chuck for quick bit change. (2) ergonomic body with auxiliary handle for better grip and stability. (3) built-in led lamp: can work even in dark environment. (4) blow molded tool box, easy to store, carry or give to friends combination of scientific accessories: the electric screwdriver comes with 6 wood drill bits (4 mm, 5 mm, 6 mm, 10 mm, 12 mm, 14 mm), 3 metal bits (4 mm, 5 mm, 6 mm), 2 hammers. ators (0.2) 36 mm 8 mm), 9 sockets (5-13 mm), 10 screwdriver bits, 1 flexible handle, 1 auxiliary handle, 2 batteries, 1 charger and 1 instruction booklet. the tool set incorporates commonly used accessories and sizes for a wide range of applications, making it an ideal partner for diy, assembly and repair jobs customer service: sundpeypro has a professional customer service team, if you have any questions about the drill, please feel free to ask us, if there is any quality problem, we will guarantee the replacement to ensure your shopping experience