This is a set of five 12 volt, 30 ampere hour batteries with non-spill caps, connected in series. It is constructed of red fiberglass laminated 3/8" thick plywood with steel reinforced corners and aluminum edges. All latches and carrying handles are recessed. The back panel has one flush mounted 2-wire 20 amp female twist-lock flanged outlet (Battery Charger Connection). It also has 1 flush mounted 3-wire 30 amp twist mount inlet (Jumper Cable Connection).