5-Speed Adjustment Mini Electric Grinder Tool Set USB Charging Grinding Machine 2000mAh Rechargeable Handheld Rotary Tool Set with Li-ion Battery USB Charger for Jade Carving Wood Punching Metal Grinding Polishing With different accessories, this kind of electric grinder can be used for carving, polishing, cutting and drilling of multiple materials. With high machining efficiency, it is your nice helper. Features: Lithium batteries are equipped with Electronic Cell conservation (ECP), which can prevent lithium batteries from overcharging and overloading and improve battery life. 5 speed speed adjustment(3000-15000rpm), the speed from low to high, basic to meet different needs. The machine has novel appearance, exquisite workmanship, suitable for handheld operation, convenient and . The machine uses 2000mAh large capacity power battery, USB charging port design, support quick charging. The machine with lighting, for stone lovers to design, also can be used for emergency lighting. It is excellent for kinds of material engraving and grinding, such as wood, stone, peach-pit, egg, crafts, , ceramics, and etc. Manual sculpture, polished jade, stone, , wood, computer case, circuit boards, PC material drilling. Specifications: Color: Black / Red (Optional) Material: ABS Voltage: 3.7V Collet Size: φ3mm Speed: 3/6/9/12/15*1000 rpm (3000-15000rpm) Li-ion Battery Charger: DC5V/2A(input), DC3.7V/500mA(output) Battery: 3.7V, 2000mAh Item Size: 178 * 33 * 30mm / 7.01 * 1.30 * 1.18inin Item Weight: 133g / 4.71oz Package Weight: 266g / 9.40oz Package Size: 21.2 * 7.2 * 5.7cm / 8.35 * 2.83 * 2.24in Packing List: 1 * Grinder 1 * USB Cable 1 * Li-ion Battery Charger 1 * Sanding Drum Mandrel 1 * Wheel Mandrel 1 * Felt Mandrel   1 * Cut-off Wheel 2 * Felt Polishing Wheel 2 * Diamond Bit 3 * Twist Drill Bit 3 * Sanding Sleeve 5 * Stone Grinding Bit 5 * Collet 1 * Accessory Case 1 * Manual (English)