The kit operates from a 9-volt battery. This kit is compatible with alternative power sources ranging from 9V to 12V DC. This light kit is modular; the light and the flicker control use a standard 4-pin RGB-style lighting connector. The light and controller connect with a 6-inch-long cable. The input to the controller utilizes a standard DC barrel-type connector with a center-positive +V polarity. The overall length of the assembled parts is 22 inches. The kit includes the candle flame module, the connector cable, the flicker controller, and a 9-volt battery clip assembly. The candle flame module's light head is approximately 1 inch tall and is overmolded with a robust, clear PVC resin.