Low Profile mechanical switches offers the speed, accuracy, and performance of a mechanical switch at half the height. The GL Linear switch features a completely smooth keystroke through the point of actuation. LIGHTSYNC technology provides next-gen RGB lighting that synchronizes lighting with any content. Personalize each key or create custom animations from 16.8M colors with Logitech G HUB software. The G815 uses aircraft-grade aluminum alloy to deliver incredible thin but rigid and durable design. Five dedicated G-keys can be programmed with custom macros and commands per game or app profile. Requires use Logitech G HUB to easily setup and manage profiles, commands, and more. The additional USB cable connects the USB 2.0 passthrough port to its own input for full power throughput and data speed. Dedicated media controls with a precision engineered edgeless volume wheel provide convenient and easy control to quickly play, pause, skip, or mute your media. Logitech G HUB software gives you easy control to customize and access advanced features.