The ultimate tenkeyless keyboard that retains shortcut and arrow keys. Aluminum frame. Connects with up to 3 devices via Bluetooth 5.1 and switch among them easily. With high reliable and broad compatibility Broadcom Bluetooth chipset, the K2 is best to fit home, office and light gaming use while connecting with your smartphone, laptop and iPad. It also has wired mode with USB Type-C connection. With a unique Mac layout, K2 has all necessary Mac function keys, while compatible with Windows. Extra keycaps for both Windows and Mac operating system are included. K2 can last up to 72 hours typing, or up to 7 days normal use (count 8hrs per day) with a 4000 mAh big battery, which is one of the biggest in mechanical keyboard. N-key rollover (NKRO) on wired mode or 6KRO on wireless mode. Charming RGB backlight with elegant keycap legends helps to type in dime environment, you can also choose other static color backlight mode. The K2 gives the freedom to customize your typing experience with its hot-swappable PCB. With the pre-installed Gateron G Pro mechanical switch providing unrivaled tactile responsiveness on the Brown switch with up to 50 million durable keystroke lifespan.