Item Type: Pencil Sharpener Material: ABS, stainless steelWeight: Approx. 479g/16.90oz Battery Type: Lithium battery (delivered with built-in battery) Battery Model: 18650 Battery Capacity: 2000mah Voltage: 3.7V Charging Method: USB 1、Auto Stop: Electric pencil sharpener will stop sharpening automatically when the pencil is sharpened well, to help prevent overheating.  2、Function: Put the pencil in the hole, you can get a perfect pencil, easily adjust the thickness of the pencil tip you need.  3、Portable: Easy to carry and can be used anywhere, adopt modern design, can meet different usage requirements.  4、Practical Design: The top open lid and large capacity shavings box make it easier to clean the shavings and will not mess up your desk or floor.  5、Easy Operation: Heavy duty spiral blade can help you sharpen the pencil quickly, convenient for using, saving your time and effort.