The buttons of the Enlarge Keyboard (A-Z key) with Chinese characters (Standard Version) are larger than those of ordinary keyboards in the market, and the distance between buttons is wider. The words and symbols on the buttons are larger than those of ordinary keyboards, it is used by people with poor coordination of peripheral functions or poor vision. The buttons have a rebound function, and this tactile feedback allows users to press the buttons lightly. It can be used by simply connecting the plug of the keyboard to the corresponding USB port on the computer without the need for any software installation.