[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 an powerful motor, which is suitable for small size cutting, powered by 300mAh lithium battery. It can be by USB Type-C cable, and can work for above 1 hours after a full charge.[Cordless & Portable] Wireless mini rotary tool with compact body and light weight design is comfortable in the hand. Small and body makes easy to handle for fine tasks and delicate work.[Ergonomic Design] and compact design make the electric engraving pen easy to carry. The non- handle adds extra comfort and stable control, providing a comfortable experience for precision engraving performance.Product name:Engraving PenPower:8WVoltage:3.6VBattery type:501550 rechargeable lithium batteryBattery capacity:300MHACharging time:30 minutes 80%, 60 minutes 100%Collet depth:25MMClamping diameter:3mm (suitable for all 3mm size grinding bits, reducer drills, carving knives etc.)Charging specification:USB - Type-C (for all USB port batteries)Motor speed:1 speed 5000 2 speeds 10000 3 speeds 18000 .Endurance:1 hour or more unloaded at high speedApplication:for all kinds of stone carving, wood carving, olive nucleus carving, plastic carving, egg carving, glass carving, ceramic carving, drilling and various metal surface polishing, lettering, trimming, etc.Colour:B:Gray & BlackMaterial:Plastic+MetalSize:16x120mmPackage Contents:1 * sanding pen1 box * sanding heads1 * charging cableOnly 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.