12 Volts DC operation;
BNC video connector.
Wiring (provided by end user) required, for running up neclace chain, or through hole in shirt behind the NeclaceDome.
If you're uncomfortable with the idea of doing your own wiring, you may prefer to get the DoubleWhammy, SatchelDome 5, AstroBoy, or NetPack, which are much easier to wire because of the spacious interiour of the pack or satchel.