Silent Keyboard: Innovative silent keyboard design, no friction and no shaking.Built-in USB Receiver: One receiver can be connected to the keyboard and mouse, and can be transmitted over a distance of up to 10 meters.Multimedia Buttons: Specially tuned and personalized keycaps.Slim Keyboard: Thin and light beyond your imagination, mini body, portable and easy to carry.high comfort Black Design.800 - 1000 -1200 - 1600DPI