Features: brand new and high quality USB charging, with adjustable-speed motor Mode conversion head: Unscrew the hexagon socket for head screw at the bottom of the copper for head to change the mode Forward/reverse switch: toggle the switch to the left for forward rotation, in the middle for pause, and to the right is reverse rotation Charging indicator: After connecting to the charger, the red light is charging, and it will turn into a red light when it is fully charged. Peripheral speed hole: The set is equipped with a for cross 1.5 screwdriver inserted into the hole position, and the speed can be adjusted by aligning the hole position governor. Up is high speed, down is low selection Specifications: Battery capacity: 800mAh Motor speed: 5000-10000r/min Charging voltage: 4.2V/1A Charging time: 40min Use time: 10-30 days Package Includes: 1 Set x Glue Remover Tool note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!