... :3km(in open areas) Feature:Digital play,8CHS transmitter,perfact shape,synchro transmitting AV signal.Transmitter specificationModel:FOX-215AWorking Voltage :DC 12VWorking Ctrrent ... , receive sensitive.Multiple working channels, convenience,high credibility, suit for wireless surveillance projects.Voltage: DC12V/250mAVideo output: 1Vp-pAudio output: 1Vp ...