The Cherry KW 9100 is a wireless and rechargeable keyboard, offering numerous extra features, state-of-the-art technology and the highest quality workmanship. The keyboard can be connected either via Bluetooth or by using the included 2.4 GHz wireless USB receiver. You can conveniently change between the two connection types with a sliding switch. The SX scissor technology mechanism with a low-profile keystroke ensures an ideal typing experience.