This is a kind of quality electric screwdriver, dual-torque modes design, high rotation speed, with rotation-speed-protection function. Support positive and negative rotation, easy to adjust according to your demands. Support both manual mode and automatic mode, if the screws are too tight, you can rotate the screwdriver manually. You can have a try. Features: Compact size, easy to grip, help improving your working efficiency. Dual-torque modes design, high rotation speed, with rotation-speed-protection function. Support positive and negative rotation, easy to adjust according to your demands. Support both manual mode and automatic mode, if the screws are too tight, you can rotate the screwdriver manually. Cordless design, built-in 18650 battery, USB rechargeable, economic and eco-friendly. This screwdriver bit set is made for repairs and maintenance of electronic products and precise instruments such as cellphones, watches and home appliances. Magnetic-tips for easy taking off bits, and the replacement is quick and convenient. Lightweight and comfortable for long time use. Specifications: Name: Mini Electric Screwdriver Material: plastics+metal Type: 12pcs, 88pcs (optional) Voltage: 3.6V Battery: 1 * 18650 Lithium battery, 3.6V, 1100mah (included) Speed: 250RPM Rechargeable: Micro USB Screwdriver size: 175 * 25 * 25mm / 6.89 * 0.98 * 0.98in Screwdriver weight: 145g / 5.11ounce Package size: 12pcs: 180 * 40 * 35mm / 7.09 * 1.57 * 1.38in 88pcs: 180 * 100 * 35mm / 7.09 * 3.94 * 1.38in Package weight: 170g / 6.00ounce Packing List(12pcs): 1 * Electric Screwdriver 1 * Connection Rod 10 * Screw Drill Bit 1 * USB Cable 1 * Magnetizer OR Packing List(88pcs): 1 * Electric Screwdriver 1 * Manual Screwdriver 1 * 25mm Connection Rod 9 * 28mm Screw Drill Bit 1 * 50mm Connection Rod 8 * 50mm Screw Drill Bit 66 * Screw 1 * USB Cable