?Better Design for Mac/Win Users? Following the previous successful model GK61, EPOMAKER has made some improvements based on real customer feedback. Thus we designed this new AK61 with custom Mac layout and functions for Mac users.Simply press FN+W/E to exchange between Win and Mac system. Extra keycaps for Mac are included. Change the system but with the same supreme experience ?Hot Swappable Gateron Optical Switch?To achieve ultimate experience, AK61 adopts the renowned Gateron optical switches which is also hot swappable for this keyboard. The hotswap feature has been quite popular among players. It provides more options and fun to custom your unique mechanical keyboard. With it, you can easily replace with other Gateron optical switches without soldering problem ?Three Layers Programmable&NKRO?Despite the three layers programmable mode, FN1/FN2/FN3, all kinds of keyboard key function could be set through driver, macro record, personalize your own function keys as you wish. Onboard flash memory unit could save the configuration to the keyboard if offline. The AK61 is N-key rollover, freely enjoy it without any conflict while pressing multiple keys ?ABS Double Shot Keycaps &Ergonomic Height? The GK61 adopts double shot ABS keycaps. You can change them as you wish thanks to the key puller included to the package. Ergonomic angel won’t make you feel tired. The keyboard stands out also because of its dustproof mainboard design. It’s practical and unusual ?16.8 Million RGB Backlight&Music Rhythm Effect? RGB is such a cool element while playing games. AK61 fully knows your needs and thus this model is equipped with RGB SMD light. More than 16.8 million lights are available. Hundreds of lighting effects are available for download and we continue to update it to the latest. In music rhythm mode, the light will move with the music rhythm, simply press FN+[{ four times to start this mode