The Cherry DW 9100 Slim USB Wireless Keyboard and Mouse Set combines innovative functions, outstanding workmanship and a very slim design. The mix of aesthetics and optimum comfort is perfect for any modern work desk. The keyboard has super silent keystroke using the Cherry SX scissor mechanism. Wireless RF or Bluetooth transmission, a switch on the keyboard and mouse lets you toggle instantly between Bluetooth and 2.4 GHz connectivity. The USB receiver for 2.4GHz wireless transmission is included in the bundle. In both cases, data is transferred with AES-128 encryption over a range of up to 10m. The rechargeable lithium batteries power the keyboard and mouse for weeks on a single charge.