The 21V electric screwdriver can quickly tighten or loosen screws, providing enough power to complete most household or industrial applications. The use of a brushless motor, with large torque and adjustable speed, quick-starts, timely braking, relatively simple control the circuit and so on. There are two kinds of speed control modes, 2 gears adjustment and stepless speed adjustment for you get the speed you want. Torque adjustable design, easy torque adjustment, stable torque output. Suitable for tightening screws in the home in all scenarios: such as the installation of lamps, household appliances, door locks and other disassembly.​ Features: 【Premium Material】: Simple and fashionable, made of engineering plastics material, innovative integrated structure, with ergonomic anti-slip handle, easy to grip and with comfortable hand feeling, practical and labor-saving. 【Quality Bearings Design】: Full metal gear and bearings are manufactured suing the high carbon hardness steel and quenching heat hardening process for maximum accuracy and stability, easy and accurate to find the position. 【Brushless Motor】: The use of a strong magnetics brushless motor, with large torque and adjustable speed which does not generate sparks when it is working, and the motor does not wear, can provides long service time, and greatly enhances the working efficiency. 【Multi-shift Torque Adjustment】: Torque adjustable design, easy torque adjustment, stable torque output, can satisfied with all your demands. 【Two-speed Regulation Modes】: There are two kinds of speed control modes, 2 gears adjustment and stepless speed adjustment for you get the speed you want. 【Safety Lock】: Equipped with a safety lock function, press to lock and unlock the trigger easily, which can avoids unintended hurts by accidentally touching. 【LED Light & Indicator Light】: Built-in LED working light, it will opens automatically when the trigger is pressed, and can provides illumination in dark spaces, more convenient to use. And with 3 power indicator lights to remaind you recharging in time. 【Cooling System】: Reserved several ventilation cooling holes, efficient heat dissipation, will not hot for working long time. 【Wide Applications】: Suitable for tightening screws in the home in all scenarios: such as the installation of lamps, household appliances, door locks and other disassembly.​ Specifications: Plug: US / EU / UK (Optional) Battery Quantity: 1pcs / 2pcs (Optional) Input Voltage: 110~240V Output Voltage: 21V Motor Type: brushless motor Torque: 50-90Nm No-load Speed: 0-1800r/min Speed Gear: high and low adjustable. Torque Gear: 25 gears are adjustable. Chuck Size: 1/4 " Battery Capacity: 1.5Ah Material: ABS Item Size: 20.5 * 12.2 cm / 8.07 * 4.8 inch Item Weight: 594g / 20.95oz Package Size: 24.3 * 22 * 6.3 cm / 9.57 * 8.66 * 2.48 inch Package Weight: 1 Battery: 1818g / 64.13oz; 2 Battery: 2018g / 71.18oz Package List: 1 * Screwdriver 1 * Battery / 2 * Battery (Optional) 1 * Charger 2 * S2 Flat Bits 2 * S2 Cross Bits 2 * S2 Plum Blossom Bits 2 * Hexagon Bits 1 * 6mm Twist Drill Bit 1 * 8mm Ceramic Tile Drill Bit 1 * Toolbox