Features: Up to 3 devices can be connected via Bluetooth-compatible 5.0, and can be easily switched between them. With widely compatible for Broadcom Bluetooth-compatible chipset, K28 is most suitable for home and office. There is no additional number keys, which can meet your needs in Office or Home. The mini mechanical keyboard saves space and is easy to carry. You will be satisfied with how much space you save. The professional RK blue switch is adopted, which has faster response speed, for stronger resilience, and a snapping sound, which allows you to enjoy the fun of typing in spring. K28 has 16.8 million color RGB multiple light speed adjustments, and the driver supports single button color, light effect mode, brightness and speed for definition. K28 has a unique for Mac layout, with all necessary for Mac function keys for Windows. for Windows XP/8/10MAC 10.2 and above. Specifications: Size: 290x100x35mm/11.42x3.94x1.38inches Keyboard material: ABS material Modes: Bluetooth-compatible 5.0 and Type-c USB Color：White/Pink/Blue/Black Mechanical shaft: green shaft/red shaft/tea shaft optional Number of keys:RGB mutiple lighting effects Systems Support: for Windows XP/8/10MAC 10.2 and above Package Includes: 1 Piece Bluetooth-compatible Wireless/Wired Keyboard . note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!