1. 【Quick Sharpening】 When you press the pencil, it will sharpen automatically. The blade rotates after sharpening, but the pencil will not be sharpened further. You can feel the tip and take out the pencil. It may not remain sharp for a long time, so the pencil is less likely to be wasted. The process usually takes 3 - 5 seconds. 2. 【Quickly sharpen all standard 6 - 8mm pencils】 It can sharpen colored and traditional graphite pencils, and is suitable for round, triangular and hexagonal pencils. It can be used with popular wooden graphite and colored pencils. It might not be suitable for wood - free pencils. 3. 【Portable】 The sharpener is small and portable. There are no plug restrictions and no need for wires. It is safe and efficient. It is suitable for children, teachers, artists, professors, engineers, architects and fashion designers to make drawing and writing easier. One blade can be sharpened more than 300 times. It comes with 2 replacement blades, which can extend the life of the sharpener.