Features: Brand new and high quality Positive and negative independent buttons are clear, easy to identify, skin like, smooth to control, and will not feel tired after long term use. Standard 4x28mm batch head, international common interfaces, strong versatility; The batch head is connected by magnetic attraction, which is both stable and easy to take and put. The three front LED lights work light illuminates dark workspaces without shadowing, and it is a good helper for detecting and fixing accidental power outages at home. Using high-precisions carbon brush motor, the output speed reaches 200r/mins, which meets the requirements of high screwing efficiency without losing controllability. The carefully tuned motor is enough to disassemble/assemble 30,000 precisions screws. Long battery life, once you get this precisions screwdriver set, you can use it for a long time without charging. The USB port is convenient for you to charge. Specifications: Material:Steel Voltage: 3.7VDC Speed: 200r/mins Torques: electric: 0.2Nm Manual: 3Nm Size:Approx.16.7x1.57cm/6.57x0.62inches Main engine weight: 55g Power supply mode: rechargeable lithium battery Charging method: USB charging Charging parameters: DC3.7V 260mAh Charging time: 1 hour Full charged standby: more than 180days Batch size: 4x28mm Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Electric Screwdriver 1x USB charging cable 1x Degausser 37x Bits 1x Extension rod 1x Tool storage box