Wireless Keyboard / KBRFBE71Wireless Mouse / MORFJXODongle / MORFJXO-DThank you for choosing this 2.4G Wireless keyboard and Mouse Kits. It operates with digital radio technologyto ensure no hinder communication between the keyboard, the mouse and your computer without connectingcable.The transmission and receiving of keyboard and mouse are free from angle restriction.Preparing Keyboard, mouse and receiverBefore working with your new keyboard and mouse, look at the "Hardware Installation", and take a fewone-time preparations.Hardware Installation● Place the receiver at least 20 cm from other electrical devices (e.g. monitor) to achieve optimumperformance.● The distance between the keyboard, mouse and receiver should not exceed 10 M.● Do not place the receiver on metal surfaces.● Do not move optical mouse on following surface- Glass or any transparent materials- Dark surface- Mirror or reflecting surface- Mouse pad with too many colors- Rough surface.