1、Mini size and lightweight for easy carrying and using. Humanized design, long time operation is not easy to fatigue. 2、One button to adjust forward/reverse. 3、Strong pure copper motor, low noise, long service time. 4、High concentricity, small rotation, alloy gear, stable. 5、USB rechargeable design, you don\u0027t need to worry its battery. This electric screwdriver is easy to carry, more efficient than a manual screwdriver, and simple to use. Fetaures: Mini size and lightweight for easy carrying and using. Humanized design, long time operation is not easy to fatigue. One button to adjust forward/reverse. Strong pure copper motor, low noise, long service time. High concentricity, small rotation, alloy gear, stable. USB rechargeable design, you don't need to worry its battery. Specifications: Type: set A, set B, set C (optional) Torque: max. 3N.m Working voltage: 3.7-4.2V No-load speed: 220r/min Main color: black Rated power: 4W Battery: 3.7V, 1200mAh Item size: 175 * 43 * 43mm / 6.9 * 1.7 * 1.7in Package size: 225 * 70 * 55mm / 8.9 * 2.8 * 2.2in Package weight: Set A: 197g / 6.9ounce Set B: 210g / 7.4ounce Set C: 400g / 0.9lb Packing List: Set A: 1 * Electric Screwdriver 1 * USB Cable 1 * User Manual 1 * Screwdriver Bit Set B: 1 * Electric Screwdriver 1 * USB Cable 1 * User Manual 10 * Screwdriver Bit Set C: 1 * Electric Screwdriver 1 * USB Cable 1 * User Manual 42 * Screwdriver Bit 1 * Flexible Shaft 1 * Plastics Storage Box Set A: 1 * Electric Screwdriver 1 * USB Cable 1 * User Manual 1 * Screwdriver Bit Set B: 1 * Electric Screwdriver 1 * USB Cable 1 * User Manual 10 * Screwdriver Bit Set C: 1 * Electric Screwdriver 1 * USB Cable 1 * User Manual 42 * Screwdriver Bit 1 * Flexible Shaft 1 * Plastics Storage Box