Descriptions: -Multi-powered and worldwide universal: battery and USB multi-operation, you can use pencil sharpener worldwide for free and do not have to worry about the power supply. 5 seconds fast sharpening, don't miss inspiration. Durable pencil sharpener blades, the service life is approx. 800 times. -Double Hole & Child Safety Design The electric sharpener has 2 holes. One is for 6-8mm, the other is for 9-12mm. Either for homework or for art, it will fit well. The large hole design prevents children from putting their hands in the pencil sharpener. .