Features: SIMPLE 3 SPEEDS ADJUSTMENT: One button to switch rotation speed among 5000-15000r/min, which adapt to different working situation. ENERGY SAVING: This electric drills powered by USB cable, which is eco-friendly, energy saving and convenient to use. PORTABILITY AND CONVENIENCE: Provided with the overload protection, let the work become safe and reliable; Ergonomics handle is for comfortable gripping, use anywhere anytime. VARIETY OF BITS ASSORTMENT: The accessories helps do different work like drilling holes, grinding, graving and others. Applicable to stainless steel, porcelain, stone, glass, plastic, wood, bracelet, etc. Specifications: Input Voltage: 5V/2A Output Power: 30W Speed: 5000-15000r/min Clamping Dia.: 0.5-3.2mm Size: Approx. 168x25mm Perfect For: Sanding, grinding, polishing, deburring, engraving, dust removing, drilling and more. Package Included: 1 x Black Rotary Tool Machine 5 x Brass Collets(1.0, 1.5, 2.0, 2.5, 3.0) 3 x Grinding Bits 6 x Drill Bits 1 x Mini Spanner 1 x USB Cable