Automatic and fast: this electric sharpener with premium carbon steel blades is very fast, it only takes about 5 seconds. Super dust suction: the sharpener with container has a dust suction function. The nylon brush at the bottom can easily focus on desktop debris like paper crumbs, rubber crumbs, cookie crumbs and dust. Eventually, when you get the rubber crumbs, you can clean them up without using your hands or blowing with your mouth. It will be very convenient to use. With USB Cable and Exchangeable Cutter Core: The electric pencil sharpener can be charged via USB, and can sharpen the pencil about 300 times after fully charged. The blades are removable, spare blades provided ensure the sharpener can be used for a long time. With a large space container to store more scrap, neat and tidy. Suitable for a variety of pencils: the pencil sharpener with box can be used for pencils with a diameter of 6 to 8mm, such as 2B, 4B, HB, 2H, 4H pencils, colored pencils, etc. Safe to use: If the automatic sharpener works continuously for a long time and the the motor is overheating, it will automatically shut down, and you can continue to use it after the temperature drops.