Corsair gaming k40 gives you your choice of multicolor backlighting programmable g keys with onboard storage multimedia controls and 100 anti ghosting with full key rollover on usb for fast accurate gameplay the customizable backlighting lets you choose your color to match your system or your style and the six dedicated programmable g keys let you quickly access your favorite macros presets and key combinations the full key matrix anti ghosting with full key rollover on usb t