Features: Quck installWhen the locking screw reaches the set torque value, the electric screwdriver will automatically stop to prevent skidding.One second to install the nozzle, insert the head, release. Easy charging and convenient Only below 150min to fully charged, makes charging easier and more convenient. Overcharge protection provides longer battery life.Maximum torque :3.5 (Nm).Rated speed :250 (RPM).Handedness: bidirectional.No load speed :250 (RPM). Ergonomic handle designSmall and light humanized design, ergonomic design of handle, small and light, comfortable feel, long time operation is not easy to fatigue.The type-C interface is pluggable.Powerful but small and light, just like holding a pen when using. Stable axis,high performanceHigh concentricity, small rotation range. Double planet alloy gear structure, stable axis, good working quality.Double planet alloy gear construction can reduce the swing. Ultra-light body Electric drill wowstick adopts durable body design with finely frosted surface, which is comfortable and can be non-slip, dark looks more advanced, ultra-light body, easy to carry. Specifications: Material:Iron Color:Black Power supply voltage :3.7 Maximum torque :3.5 (Nm) Rated speed :250 (RPM) Handedness: bidirectional Handle type: straight bar type Maximum screw diameter :3.5 Drive shaft/collet: collet Rated input power :4 (W) Rotation number :250 (RPM) Tightening moment :2.5 Operating voltage :3.7-4.2V No load speed: 220R /min Charging time: