Dear Sirs : We are interesting in this model unit audio and video transmitter and receiver device. We are a comapny that works on security specially with goverment agencies in Italy and abroad. Based on some rerquests we have recently had we consider your unit can cover our request without problems.We want to buy one for testing it.Please cofnirm possibility and say to us if we can do it with credit card.Regards, Eugenio Benvegnu