Simple 3-speed speed adjustment: switch the speed between 5000-15000r/min with one click to adapt to different working conditions. *Energy Saving: This electric drill is powered by a USB cord, which is environmentally friendly, energy-saving and easy to use. * Easy to carry: Equipped with overload protection, the work is safe and reliable; the ergonomic handle is comfortable to hold and can be used anytime and anywhere. *Multiple drill bit classifications: Accessories help complete different tasks, such as drilling, grinding, engraving, etc. *Suitable for stainless steel, porcelain, stone, glass, plastic, wood, bracelet Specifications: Input voltage: 5V/2A Output power: 30W Rotation speed: 5000-15000r/min Clamping diameter: 0.5-3.2mm Size: approx. 168x25mm Ideal for: sanding, grinding, polishing, deburring, engraving, dusting, drilling, etc. Packing list: 1 x black rotary tool machine 5 x brass chuck (1.0, 1.5, 2.0, 2.5, 3.0) 3 x grinding bit 6 x drill bit 1 x mini wrench 1 x USB cable