R1 is iRV 3 zones remote controller for IRV radio/Stereo DVD player with independent No. 3 Zone control

R2 is iRV 2 zones remote controller for IRV radio/Stereo DVD player

R3 is iRV 3 zones remote controller for IRV radio/Stereo DVD player without independent No. 3 Zone control

R4 is iRV 2 zones remote controller for IRV mechless radio /stereo without DVD player

BD1208 is remote controller for Autopro RV/car/ marine Bluray player BD1208