A replacement remote control units and will work as well as the originals.No programming or setup required. This remote control is equipped with backlight function.This remote is supplied with the following models.KD-43X80J KD-43X85J KD-50X80J KD-50X85J KD-55A90J KD-55X79J KD-55X80CJ KD-55X80J KD-55X85J KD-65A90J KD-65X79J KD-65X80CJ KD-65X80J KD-65X85J KD-75X79J KD-75X80CJ KD-75X80J KD-75X81J KD-75X85J KD-85X85J KD43X80J KD43X85J KD50X80J KD50X85J KD55A90J KD55X79J KD55X80CJ KD55X80J KD55X85J KD65A90J KD65X79J KD65X80CJ KD65X80J KD65X85J KD75X79J KD75X80CJ KD75X80J KD75X81J KD75X85J KD85X85J KD85X91J RMF-TX520U RMFTX520U XR-50X90J XR-50X94J XR-55A80J XR-55A84J XR-55A90J XR-55X90J XR-55X94J XR-65A80CJ XR-65A80J XR-65A84J XR-65A90J XR-65X90J XR-65X94J XR-65X95J XR-75X90J XR-75X94J XR-75X95J XR-75Z9J XR-77A80CJ XR-77A80J XR-77A84J XR-83A90J XR-85X95J XR-85Z9J XR50X90J XR50X94J XR55A80J XR55A84J XR55A90J XR55X90J XR55X94J XR65A80CJ XR65A80J XR65A84J XR65A90J XR65X90J XR65X94J XR65X95J XR75X90J XR75X94J XR75X95J XR75Z9J XR77A80CJ XR77A80J XR77A84J XR83A90J XR85X95J XR85Z9JThis SONY RMF-TX621U remote control will need to be paired (registered) to your SONY TV if you want to use the voice / microphone function.To register this voice (microphone button) remote control, press the HOME button and select (SETTINGS) (REMOTE CONTROL) (CONNECT via BLUETOOTH)