Mechanical Operation:Experience the precision of mechanical keys with the GMK87 mechanical keyboard kit. Its tactile feedback ensures accurate typing, enhancing your gaming performance. Multicolor Backlight:This keyboard features a vibrant multicolor backlight, allowing you to customize your gaming environment according to your preference. Hot Swap Feature:The hot swap feature allows for easy replacement of keys, providing a unique customization experience and ensuring the of your keyboard. Bluetooth Wireless Connectivity:With Bluetooth wireless connectivity, this keyboard offers seamless pairing and operation, ensuring uninterrupted gaming experience. 84 Key Layout:The 84 key layout of this keyboard provides ample keys for all your gaming needs, including dedicated keys for media control and internet access. Our keyboard kit's FN key is a function key, and there is no specific response from a single point. If you test the software again and there is no response, it is normal because it is a function key and needs to be combined with other keys to reflect its function (the" menu" key also cannot be opened in some testing software, not a product issue). FN key cannot lock function. Our keyboard kit can switch between for- and systems. If your computer is a system, press alt but the test software shows the win key function. Don't panic, just switch the system switch to the corresponding system mode (there is a switch next to the type-c plug hole, or press FN+a/s to switch to the corresponding system). Driver download link: https://.mediafire.com/folder/6qd8w51cpohgd/json Specification: Model: GMK87 Kit Keys Amount: 85 Keys + 1 Knob Hot-Swappable: Yes Connectivity:Type-CWired, Bluetooth 5.0 & 2.4GHz Structure: Gasket Mount Note: 1. Just a keyboard kit, no switches or keycaps 2. Different batches may have erent appearance, which does not affect use. Material: ABS+foam colour: black Package Contents: 1 x GMK87 Mechanical Keyboard KIT 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.