smooth operation, strong service life, high quality batteries, energy recovery system, the kinetic energy into electricity more durable. low noise, enough power, control of dual-range speed can achieve precise speed adjustment, to prevent screw chipping. Two-speed impact resistance, concrete is easy to break. housekeeping, machine control, become the home installs the king of universal, multi-purpose, easily get all kinds of jobs. spherical grip is comfortable, avoid slipping, after long-term use will not be tired. everyone can use it easily. Product Description Usage: Homemade Maximum torque: 3.5 N/m Rated input power: 144 Frequency: 50/60Hz Rated voltage: 3.6V Power supply: Battery < p>Type: Cordless screwdriver