I am putting a system together for a foreign country that requires a portable wireless transmission of video and audio that would cover up to a one mile radius from a disaster recovery train. We already have satellite communications/transmission from that site to the capital. What we need are portable cameras with a wireless solution. By nature, we would need battery packs, etc. There will be 50 cameras and audio (two per location). In addition, there will be four channel ruggedized DVR's at each train location. Anyone having experience in this please contact me at once.