RGB-LIGHTSYNC backlit keys: G512 is full spectrum ~16.8M colours with customisable per key lighting. Lighting is driven by games in the new LIGHTSYNC technology for a full immersive RGB experience Choice of Mechanical Switch: Choose from three distinct mechanical switches, Romer-G Tactile, Romer-G Linear and GX Blue. GX Blue provides both tactile and clicky feedback you can feel and hear Aircraft-Grade Aluminium Aloy: The brushed aluminium-magnesium alloy top case serves as the Logitech G512 wired gaming keyboard’s backbone for a minimal design balanced with a full set of features USB Passthrough: The additional, dedicated USB cable connects the USB passthrough port to its own input for 100% power throughput and data speed. Plug in a mouse or other device to charge Full Function Keys: Use the FN key to control volume, play and pause, mute, toggle game mode, change lighting effects, etc. Use Logitech Gaming Software to configure your function keys