The BRC4C65 can be used with up to 16 indoor units and also features the ability to adjust air-flow to suit the system without having to manually adjust duct work. This remote is compatible with the following models FBQ, FXMQ-P7, FXLQ-P, FXNQ-A, FXDQ-A, FBQ71, FBQ100 and FBQ140. Operation Buttons: ON/OFF Operating mode selection Temperature setting Fan speed control Air flow direction (for indoor unit FXFQ and FXAQ models only) Timer mode on/off Timer mode start/stop Inspection/test indication