This small screwdriver set is powered by a rechargeable 3.7v lithium-ion dc battery with a 850mAH capacity. The battery is charged by using a type-C USB connecting cable, which is in the package with the screwdriver, and the charging time is 2 to 3 hours. The no-load speed is 220rpm the electric torque is 4N.m and the manual torque is 8N.m making it great for the small jobs around the home or office. it comes with 10 of the mostly used bits which are 1-T20-1-T25 bits, 1-H4-H5 bits, 1-PH1, HP2, and HP3 bits, 1-SL4-SL5 bits, and 1-U2.3 bit with the a bit holder and 1-extension.