This is a replacent board for hw plug-and-play transmitters, or make your non plug and play transmitter to a plug play version. Do It Yourself (DIY).
This replacement plug-and-play boards has regulated 12V output to transmitter and 12V for Cameras. The power input port (plug) is reversed-polarity protected, you can't damage it if you accidently plug reversed power.
Operating Voltage: 10.5-22 volts DC
Size: 38.1mm x 25.4mm