The charging time is about 20 minutes, can complete the work quickly and smoothly Intelligent overload chip protects motor safety at all times. The tool automatically stops when it is overloaded to prevent motor loss and extend service life This USB fast-charging electric sanding pen is equipped with 8 specifications of high-quality sanding heads The size and shape are easy to identify. Various shapes of sanding heads and sandpaper of various precisions meet the needs of DIY craft enthusiasts,The versatile detail sander is ,has three-speed adjustment, 2800/3100/3600 times per minute, Our micro-sander has a reciprocating mechanism, which makes the sanding process more uniform and stable. This movement ensures that the sanding pen can continue to provide stable sanding when processing details, resulting in a smoother and more uniform sanding effect The small for tight spaces, small grinding, polishing, DIY crafts, and the drill bit can be quickly replaced. Whether it is for the detail processing of wood, plastic or metal materials can be used, Weight: 0.67130758779 Pounds, Manufacturer: Prterver