tenwin Portable Electric Pencil Sharpener Durable Helical Blade Sharpness-adjustment USB/Battery Operated Fast Sharpen Auto Stop for 6-8mm Colored Pencils for Home Office School Classroom Students Artists Features: Auto working:Put the pencil in the sharpener hole and push it down lightly, it will sharpen your pencils or colored pencils to a perfect point.Fits for 6-8mm diameter wooden and color pencils. Sharpness-adjustment Function:With a control knob for you to adjust the thickness of pen tip, very convenient e. Power Supply Mode:Powered by 4 * AA batteries or USB Cable, easy e and carry. (Batteries are not included) Safety conservation:The sharpener can store pencil shavings, you do not need to clean up every time. Anti-skid pads at the bottom to make sure stable and safe operation. Open the sharpener cover, it will stop to work, not afraid to hurt your hand, very safe and reliable. Durable Helical Blade:The blade is sharp and safe, which can be replaced and increased the long life of the electric pencil sharpener. Appearance:Submarine modeling, which is mainly made of ABS material, smooth touch feel. Perfect for using at home, classroom and office. Specifications: Model: 8030 Color: Black/White(optional) Material: ABS Pencil Diameter: 6-8mm Power Supply: USB Cable or 4 * AA batteries (not included) Item Size: 11.7 * 7.5 * 9.4cm / 4.6 * 3.0 * 3.7in Item Weight: 230g / 8.1oz Package Size: 13.5 * 9.3 * 10.3cm / 5.3 * 3.7 * 4.1in Package Weight: 315g / 11.1oz Packing List: 1 * Sharpener 1 * USB Cable 1 * User Manual(English/Chinese)