With 3 adjustable speed level, this multifunctional mini electric grinder can be used for polishing/grinding/drilling ceramic, plastic, iron bar, walnut, wood, etc. Features: [Wide Application] Can be applied to polishing/grinding/drilling ceramic, porcelain, plastic, metal, stone, modeling clay, walnut, wood and more smooth workpieces. [21Pcs Accessories] Comes with a small plastic tool kit, which includes different kinds of drill bits, grinding stone bits, grinding wheels, mandrel and collets. [Adjustable 3 Speed Level] Adjustable different no-load speeds from 6000rpm to 15000rpm meet more fine and delicate work. [Rechargeable USB Port] Designed with a Micro USB port for convenient charging, which also supports quick charge. [Compact & Lightweight] Measures 5.9*0.98in, weighs 3.52oz, held like a pen, which is compact and lightweight to hold, for easy one-handed operation. [Premium Quality] Equipped with electronic cell conservation(ECP) to avoid overcharge, over discharge and overload, effectively prolong the service life of battery. Note: *Keep the machine away from the reach of children. *Please allow an 1-3cm error due to manual measurement. *Please read the user manual carefully before use. *Do not apply it on hard materials. *Pull out the plug before maintenance. *Keep the machine clean. *Keep the air vent unimpeded. *Do not use the sharp material to clean the machine. *Do not let liquid enter into the machine to prevent it from rusting. Specifications: Color: Grey Material: ABS Collet Chuck Diameter: 0.5mm / 1mm / 1.5mm / 2.4mm / 3mm / 3.2mm Rated Voltage: 3.7V Rated Power Output: 20W No-load Speed: 15000rpm Current: 5.5A Charge Port: Micro USB Battery Type: Lithium Battery Battery Capacity: 380mAh Charging Voltage: 5V Item Size: 15*2.5cm / 5.9*0.98in Package Size: 21*8*6cm / 8.26*3.14*2.36in Item Weight: 100g / 3.52oz Package Weight: 214g / 7.55oz Packing List: 1 * Polisher 1 * USB Charging Cable 1 * Accessories Kit(6*Collet / 4*Grinding stone bits / 5*Drill bits / 1*Mandrel / 2*Grinding wheel ) 1 * User Manual