[Wide Application] Cordless rotary tool can be used to engrave wood, stone, crafts, glass, ceramics, etc. It can also be used for carving, sanding, grinding, drilling, cutting and so on. [Rechargeable Battery] The engraving pen has a powerful motor, suitable for small size cutting, powered by a 300mAh lithium battery. It can be charged via USB Type-C cable and can work for over 1 hour after a full charge. [Cordless & Portable] Wireless mini rotary tool with compact body and light weight design is comfortable in the hand. Small size makes it easy to handle for fine tasks and delicate work. [Ergonomic Design] Compact and ergonomic design makes the electric engraving pen easy to carry. The non-slip handle adds extra comfort and stable control, providing a comfortable experience for precision engraving performance. Product name: Engraving Pen Power: 8W Voltage: 3.6V Battery type: 501550 rechargeable lithium battery Battery capacity: 300mAh Charging time: 30 minutes to 80%, 60 minutes to 100% Collet depth: 25mm Clamping diameter: 3mm (suitable for all 3mm size grinding bits, reducer drills, carving knives, etc.) Charging specification: USB Type-C (compatible with all USB port power sources) Motor speed: 1 speed 5000 rpm, 2 speeds 10000 rpm, 3 speeds 18000 rpm Endurance: 1 hour or more unloaded at high speed Application: For all kinds of stone carving, wood carving, olive nucleus carving, plastic carving, egg carving, glass carving, ceramic carving, drilling, metal polishing, lettering, trimming, etc. Color: Gray & Black Material: Plastic + Metal Size: 16 x 120mm Package Contents: 1 x Sanding pen 1 box x Sanding heads 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement may vary by +/- 1-3cm.