The Romer-Gmechanical switch is purpose-built for pro-grade performance, responsiveness and durability. Romer-G is also purpose-designed for precise and clean lighting through the keycap. Keys are always visible and never distracting, especially during late night gaming sessions Additional USB cable connects the USB pass-through port to its own input for 100% power throughout and data speed. Plug in a device to charge or plug in a mouse to charge your adversaries FULL FUNCTION KEYS: Function (FN) keys let you control volume, play and pause, skip track, mute, toggle lighting, enter game mode, etc. The brushed aluminum-magnesium alloy top case serves as the keyboard�s backbone. The result is a minimal design balanced with a full set of features