【Dual Powered】Dual power supply mode, can use USB plug power supply, can also use Lithium batteries power supply, can meet the needs of different places. Charging: blue light flashes slowly. Full charging: blue light is on. 【Pencil Sharpener Size】Can be Cut diameter: 6-12mm Pencil/Color Pencil, , with flexible designed of hole entry, automatic clamping.Thickness Adjustable, 3-position switch, adjustable thickness, both thick and thin pens can be cut. 【Safe to Use】Open the box and cut off the power, open the waste bucket lid, the machine cannot start, safe to use. 【Portable Pencil Sharpener】The Pencil Sharpener be a real space saver. It is also very portable, An ideal choice for artists, students, professors, engineers, architects, and fashion designers of all ages, making drawing, writing, and coloring much e 【After-Sale】We cherish every customer and commit to providing you with good service. If you have any problem, contact us first, we'd like to solve your problem as soon as possible.