Features of the Logitech G815 Lightsync RGB Low-Profile GL Tactile Mechanical Gaming Keyboard in Black with a US English layout LIGHTSYNCPlay G815: The Next Level Featuring low-profile mechanical key switches in a sleek, ultra-thin design and cutting-edge LIGHTSYNC RGB technology, the G815 is a new class of high-performance mechanical gaming keyboard. Mechanical Low Profile Get performance, accuracy, and speed at half the height.