Features: 1.Support Positive & Negative Rotation: Just press the button to unscrew or screw up the screws with ease. 2.Dual Working Modes: When the screws are too tight, you can rotate the screwdriver manually. 3.Built-in Rechargeable Battery: 3.6V 1300mA lithium battery, easy and quick for charging via Micro USB interface. 4.Mini and Compact Design: Lightweight and comfortable for long time use, a good helper for repairers. Three specifications avaible, you can choose 1pcs set, 12pcs set and 88pcs set according to your demands. Packing List (Set1): 1 * Screwdriver 1 * USB Cable 1 * Bit Packing List (Set2): 1 * Screwdriver 1 * USB Cable 1 * Magnetizer 4 * Extension Rod 7 * Different Screwdriver Bits Packing List (Set3): 1 * Screwdriver 1 * USB Cable 1 * Magnetizer 1 * Accessory 9 * Extension Rod 10 * Different Screwdriver Bits 66 * Screws