The Sony RMSRG440 Audio Remote Control is originally supplied with Audio System models: Sony CMTHP7, Sony CMTPH7, Sony HCDGX45, Sony HCDHP7, Sony MHCGX45, Sony MHCRG330, Sony MHCRG440S, Sony RMSRG440,

The Sony RMSRG440 Audio Remote Control is compatible with Audio System models: Sony HCDGX20, Sony HCDGX25, Sony HCDGX40, Sony HCDRG20, Sony HCDRG30T, Sony HCDRG33, Sony MCCGX8800, Sony MCHGX45, Sony MCHGX8800, Sony MHCDX10 Sony MHCGX20 Sony MHCGX25 Sony MHCGX25D Sony MHCGX30 Sony MHCGX40 Sony MHCGX405 Sony MHCGX8800 Sony MHCQX25 Sony MHCRG20 Sony MHCRG30T Sony MHCRG4 Sony MHCRG4SR Sony MHGCX45 Sony MHGGX8800 Sony RMSR231 Sony SONMHCGX20