New Sony Audio System/TV/VTR Remote Control RM-U421 Supplied with models: R4200 R4300 SEN421CD SEN431 TA-AV431 TA-AV531 New Sony Audio System/TV/VTR Remote Control RM-U421 Supplied with models: R4200 R4300 SEN421CD SEN431 TA-AV431 TA-AV531 Also works on many more Sony audio models. Sony Part number 169302211