About this item SMALL COMPACT SIZE& BIG FEATURES: Super Hardware Architecture,32-bit M3 master MCU+8M FLASH onboard storage+3 channels of 256-level professional RGB color management chip. Mainboard is water resistance. HOT SWAPPABLE & GATERON OPTICAL SWITCHES: Hot swap keyboard do not require you to solder, gateron optical switches can be hot swapped at wish and replaced by other switches (Hot Swappable with Optical switches only). Gateron optical switch provides different damping and feedback intensity according to different colors of the switch, and can be triggered quickly and respond more sensitively. DIY RGB LIGHTING EFFECTS: 16.8 Million Color combinations meet your needs, multiple backlit modes are available to adjust as you wish. The brightness of the RGB light can be adjusted and the lighting effect is great. N-KEY ROLLOVER AND CUSTOMIZED 3 FN MODES: Heywood SK61 is N-key rollover, freely enjoy it without any conflict while pressing multiple keys. 3-layer editable download function, FN1/FN2/FN3 user-defined, all kinds of keyboard key function could be set through driver, macro record. You can personalize functions as you like. STABLE TYPE C CABLE: Strong Compatibility with Mac and Windows . Type C cable is broad compatible with Windows10/8/7/Vista/XP and Mac OS.