Das Keyboard Model S Professional Silent sports high-end mechanical key switches that are less clicky than its cousin the Model S Professional. This silent model (read not silent but less clicky) is ideal for people working in an open environment or for workers who need to type while talking on the phone. The Model S Silent keeps its outstanding tactile feel. Every other characteristic is the same as the Model S Professional, including a 2-port USB 2.0 hub and newly redesigned electronics providing full N-key rollover and media function.