Digital play,8CHS transmitter,credibility,synchro transmitting AV signal,use for mid-distance of wireless transmitting equipment Specification: Working VoltageDC 12VWorking CUrrent250mAOutput ... +50 0CInstalling:A.The line has plugs for connecting transmitter ,cmaera and power supply.One of the line's ponints connecting ... avoid mistake operation.C.Setting the same channel with transmitter and receiver