I-Rocks RF-6577L-BK &ndash; Retro 2.4GHz Wireless Keyboard and Mouse Combo (Black) Ultra slim design ideal for Windows-based PC's 2.4GHz wireless technology performance up to a 32-foot operating distance. Nano receiver storage design Comfortable scissors-structure key switch architecture for faster and quieter typing on keyboard design. 800 / 1200 / 1600 dpi optical resolution technology provides high accuracy and precision which works on most desktop surfaces.