BRIVO® ACS6000 Expansion Chassis (Accommodates two (2) expansion boards). Compatible with all BRIVO® ACS000 and ACS6000 series panels; 1 - Internal Power Supply (Does not support power for electronic locks); 1 - Plug-in Transformer with Adapters for Type A, C and G Socket; 1 - 12v 7.0 Ah Sealed Lead Acid Battery (not included).