The Sound Bar Remote app provides easy operation for select Yamaha Sound Bars using your Android device. [Key Features] - Basic control functions such as volume up/down and input selection - Sound mode selection [Requirement] You will need to allow permission for this app to access your mobile device's location. This is only to search and connect with your Bluetooth device (Sound Bar). We do not collect your actual location using GPS. [Supported Models] SR-B40A, SR-B30A, SR-B20A,