The following Sony audio systems are compatible with the RM-S221 remote control: LBT-A195,LBT-A190,LBT-A191,LBT-A192,LBT-A193,LBT-A194 Please note that this is not an exhaustive list, and there may be other Sony audio systems that are compatible with the RM-S221 remote control. If you are unsure whether or not your audio system is compatible, you can contact us.