Feature:1. C-harging and plugging dual use, can be connected to the power while charging, more efficient.2. There is an inner hexagon wrench receiving hole at the rear.3. Jacking type grinding heads lock mode, no skid.4. LED displays power, speed, and load information, giving you more accurate control of the Grind Tool.5. Made of fine quality material for long service time.Specification:Suitable for various kinds of stone carving, wood carving, olive carving, plastics carving, carving, ceramic carving, drilling and metal surface grinding, engraving, trimming, etc.Features:C-harging and plugging dual use, can be connected to the power while charging, more efficient.There is an inner hexagon wrench receiving hole at the rear.Jacking type grinding heads lock mode, no skid.LED displays power, speed, and load information, giving you more accurate control of the Grind Tool.Made of fine quality material for long service time.Specifications:Color: silverPower: 8WClamping diameter: 3mmMotor speed: 1 gear 5000, 2 gear 10000, 3 gear 18000Battery: 3.6V, 300mAhUSB cable length: 0.5mPackage size: 210 * 135 * 35mm / 8.3 * 5.3 * 1.4inPackage weight: 120g / 4.2ouncePacking List:1 * Engraving Pen1 * USB CablePackage List:1 * Engraving Pen1 * USB Cable