Das Keyboard Professional Model S for Mac (DASK3PROMS1MACCLI) - Manufacturer Refurbished German-engineered mechanical key switches with gold contacts (Cherry MX blue) Laser-etched key cap inscriptions to prevent fading Special Mac function keys: sleep, brightness +/-, mute, volume +/-, eject, play/pause, next and previous track. Two-port USB 2.0 hub allows for syncing and charging iPhone, iPod and USB compatible devices. 5-key rollover--Great for fast typists and gamers alike