Features: ✔. Please kindly note that the Pencil Sharpener can be powered by either 2 AA batteries (Not included in the package or item) or the power cord with the usb port which included. ✔. No pressure, no energy, no working. The Pencil Sharpener will work automatically with outside force. Putting the pencil into the entrance of the sharpener and then press it down. The sharpeners will startup automatically. Otherwise the product will not work. It is a kid-friendly design; it will not hurt your cute baby/kids when him/her put their little fingers in it. The pencil will be trimmed well 5 seconds later, removing your pressure on the pencil; the sharpener will shut off and stop sharpening automatically. ✔. Use your own brush/ soft cloth to clean shavings inside. Please do not use any metallic articles. Otherwise the blade will be damaged. ✔. Children under age of 4 must use it follow adults' guidance. Specifications: Unit Dimension: 3.15 x1.65 x 3.03in (LxWxH) Unit Weight: 100g / 3.5oz(approximate value) Pencil Diameter Suitable for Use: φ8mm Power Supply: Input, 100-240V AC. Output, 4.2V 800mA or 2 "AA" alkaline batteries (Not Included). Note: 1. The batteries should be installed correctly. 2. Be cautious of your fingers from being hurt by the razor while cleaning the sharpener. 3. Don't try to sharpen crayons, chalk or wax pencils which will clog the cutter. Package: 1 X Electric Pencil Sharpener 1 X USB Cable 1 X User Manual