80% TKL Form Fact - The brand K660 PRO tenkeyless features an 87 layout design, loose the numpad for more -moving space. K556 structure and material in a compact design, crafted for FPS gamers. 3-Mode Connection - Geared with innovative tri-mode connection technology, USB-C wired, BT 3.0/5.0 & 2.4Ghz modes which make the user experience upgraded to another level in all fields. YES! TRUE HOT-SWAP - The transformative innovation with 99.8%+ switches compatible free-mod hot swappable keyboard is now. The structure design of the socket makes the mounting easier and less wobbling. Aluminum Board - Upgraded K660RGB-PRO (K556 TKL) version keeps using the same tank-solid aluminum metal board material covered with the classic brushed surface process. Keep the keyboard steady and elegant on the desk, for a typing experience. Quiet+ Red Switches - Quiet basic linear mechanical switches, soft key travel makes every click easy to register. Along with 3.5mm sound absorbing , delivers a clear and crisp typing sound with no noise. Easy to update it with your wished , no forum researching is required. Vibrant Groovy RGB - Up to 20 presets backlighting modes are free to choose by the keyboard itself. Brightness and flowing speed is also adjustable on board. Select your own preferred modes for any playing. Pro Software Supported - Expand your options using the software to design your own modes and effects found on shop. Macros with different keybindings or shortcuts for more efficient work and gaming.