All positive, negative & grounding buses installed, fully pre-wired. Includes set of 30 common DC labels. Label backlighting pre-installed. All LEDs installed. Detailed installation instructions and cutout template. Analog VoltmetersL 8-16V DC; Simple 2-wire connection. Analog Ammeters: 0-50A DC + External Shunt; Simple 2-wire connection from shunt. no other power required. Meter senses & powers from shunt connection. Seven 15A installed single pole circuit breakers. 5-1/4 x 11-1/4.