12 Volts DC operation;
BNC video connector.
The backpack provides you with plenty of room to stow your own recording device, or transmitting device, or both. There is also plenty of room for a large battery.
Alternatively, no transmitter or recording device is needed. Simply wear the backpack as a deterrent against crime. With such a conspicuously concealed camera, nobody will know whether or not you're live, so they will simply have to be on their best behaviour at all times.