its a distrobution block. has bout 5 fuses inside and 4 slots on 1 side for positive wire 4 slots on other for neg and main slots on bottom for ur main power/ground /remote. also reads volts etc
i had 0 gauge runnin to the main piece and 4 gauge comin from the sides to both my amps. kinda koo if u dont have a audio control epic 160 cuz the powerplant reads ur volts so u can see if ur droppin low