Using an included USB Type-A dongle for 2.4 GHz wireless communication, the Wireless Extra-Duo Keyboard & Mouse from SIIG is a wireless keyboard and mouse combo with a line-of-sight range of up to 33'. The keyboard features a 102-key QWERTY layout with membrane key switches for a smooth and tactile experience, with eight hot keys. Folding posts underneath help users to better position it for an improved typing angle. It is also spill resistant, with five drain holes that help it to withstand spills, though it is not water resistant and should not be submerged. The mouse has a 3-button design with a scrolling wheel, and its optical resolution may be adjusted from 1000 to 1600 dpi for more precise movements.