UMT NanoHD F1 Air unit Digital Optic Fibre TX Module (HDMI pod/Network camera)Great Mainlink NanoHD Fiber Optic Link: Because RF is for Losers Ever tried to send a high def video signal 20km through a dense urban environment using standard 5. 8GHz? Spoiler: You can't. Not unless you're using this literal piece of string made of glass. The Great Mainlink NanoHD system is the tech equivalent of bringing a sniper rifle to a pillow fight. If you are tired of RF interference ruining your day, it's time to get wired. Why You Want It