We don’t know where the use for this device would come into play, but where there’s a will, there’s a way. The Wireless Camera Hunter and Viewer scans commonly used wireless video frequencies and then ‘locks into the source’ from up to 500’ away to display its image on the 2.5�? Color TFT screen. You’ll need 4AA batteries and a penchant for mischief.
Available here for $500.