The SK621 is a truly portable keyboard with mechanical switches. The 60 percent format removes the Nav keys and numpad, but still packs all the signature Cooler Master features like on the fly controls and Hybrid key rollover. Cherry MX low profile switches with reduced travel and actuation distance means you get all the precision and durability of a mechanical keyboards, but with the slim stylings of a minimalist, chic let keyboard. Add in a refined brushed aluminum housing and Bluetooth wireless capability, and you have the ultimate on the go mechanical keyboard.