Keyboard, mouse, multimedia, string, macro and other functions can be customized to replace combination keys, shortcut keys, and arbitrary keys Braille design Considering the work needs of special groups, Braille design is specially added Concave and convex touch The key position uses raised Braille symbols to mark the keys Sound and vibration feedback Add feedback mechanisms such as sound vibration to help the deaf, dumb and visually impaired people operate This product provides key definition setting software for multiple systems, which can be used in multiple systems after setting without resetting The mouse function can be set to the left mouse button, right mouse button, middle mouse button, and other shortcut keys. The keyboard function can be set to save, copy, paste, switch programs, and other shortcut keys, function keys, and combination keys. function can be set to quickly enter . The multimedia function can be set to pause, play, previous song, next song, open my computer, and other shortcut keys. The macro function can set a series of complex keyboard and mouse operations, key presses, moves, clicks, scrolls, and other related operations. Specification: HK31UBM Material: Plastic+Iron colour: Black Package Contents: 1 x Mini Keyboard 1 x fixed seat 1 x iron sheet Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.