The Cherry Stream USB Desktop Keyboard and Mouse Set includes a wireless keyboard and mouse. The keyboard has a precise typing feel and quiet keystroke. Cherry SX scissor technology makes writing quiet and easy. The Stream mouse has six buttons and a 3 position adjustable DPI switch. Silent switches are built in under the buttons. They are chosen so that the silent click is particularly quiet. To ensure that the mouse is as sophisticated as its keyboard partner, its ergonomics have also been meticulously tested. Large or small, right or left, the mouse fits in all hands.