The Sony RMX57 Car Audio Remote Control is originally supplied with Car Audio System models: Sony CDX525RF, Sony CDX52RF, Sony F6FF18, Sony F6FF18C82, Sony F6FF18C829, Sony F6FF18C829U,

The Sony RMX57 Car Audio Remote Control is compatible with Car Audio System models: Sony CDF505RF, Sony CDX505, Sony CDX505RF, Sony CDX505SRF, Sony CDX52, Sony CDX525, Sony CDX52R, Sony EXCD3RF, Sony RMX57, Sony SLV340