tiny battery powered 2.4Ghz av sender

We are after a hardware engineer / electronic engineer to create a prototype of an battery powered 2.4Ghz AV Sender. Basically it will consist of standard RCA Video in and Stereo audio in and tranmit signals to a standard size AV Receiver. It does not need to be in a nice case, just a working barebone will be fantastic. The smallest possible form factor is very critical. Thank you and have a nice day.