Manuals and Downloads - Bose
https://www.bose.com/.../manuals_downloads.htmlDownload and install Bose SoundTouch App ... the SoundTouch app will prompt you to update upon opening the app. You can also manually check if an update is available in the SoundTouch app by completing the following steps: In the SoundTouch app, select Menu ... SoundTouch 20 System Series I & II + $50.