Features:1.SIMPLE 3 SPEEDS ADJUSTMENT: One button to switch rotation speed among 5000-15000r/min, which adapt to different working situation.2.: This electric drills powered by USB cable, which is -friendly, and convenient to use.3.PORTABILITY AND CONVENIENCE: Provided with the overload protection, let the work bme and reliable; Ergonomics handle is for comfortable gripping, use anywhere anytime.4.VARIETY OF BITS ASSORTMENT: The accessories helps do different work like drilling holes, grinding, graving and others.5.Applicable to stainless steel, porcelain, stone, glass, plastic, wood, bracelet, etc.  Specifications:Input Voltage: 5V/2AOutput Power: 30WSpeed: 5000-15000r/minClamping Dia.: 0.5-3.2mmSize: Approx. 168x25mmPerfect For: Sanding, grinding, polishing, deburring, engraving, dust removing, drilling and more.  Packing list:1 x Black Rotary Tool Machine5 x Brass Collets(1.0, 1.5, 2.0, 2.5, 3.0)3 x Grinding Bits6 x Drill Bits1 x Mini Spanner1 x USB Cable  Dear buyers, we appreciate your business, if you are satisfied with our service, please leave us a positive feedback and rate the details of the transaction (Detailed Seller Ratings) with a''PERFECT 5 STARS''.If you have any problems, broken, quality problems, please don't worry, and don't leave bad feedback. Please send us an email first, we will reply you as soon as possible, please allow us to respond within 12 hours. We understand your mood, and will provide you with the best solution for your problem, please give us the opportunity to solve the problem, For any case,please feel free to come to us,we are always here. look forward to and thank you for your trust.