Bút mài điện AOTO chip 3 tốc độ cho điện thoại CPU IC

Electric Grinding Pen Overload-protection Chip 3 Gears Speeds for Phone CPU IC Features: 100% brand new and high quality. Adopts intelligent overload-protection chip, practical and can provide high working efficient. Compact size, lightweight and portable, cordless design for easy operation. Elegant and exquisite appearance design, streamlined design fully reflects the concept of ergonomics. Three gears of speed adjustable, you can adjust the working speed you want for different usage. USB rechargeable design, do not need to change battery very often. Widely applications, ideal for carving wood,porcelain, metal lettering and so on. Specification: Material: Stainless Steel Size: approx 12.5x1.5cm/4.92x0.59 inches Voltage: 4.2V Speed: 5000-10000-18000 Grinding Head Diameter: 2.35mm/0.09 inches Package Includes: 1x Charging Grinding Pen note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.