A:Answer Thank you for the great question! Both systems were engineered to provide crisp, clear, room-filling sound. They both have a single CD-player, AM/FM tuner, AUX input, and alarm clock features. The Wave SoundTouch System IV brings additional features, such as Wi-Fi and Bluetooth connectivity. These bring additional music listening options, such as SoundTouch Music Services (e.g. Pandora, Deezer, Amazon Music, Spotify, iHeartRadio, SiriusXM, and more), as well as the ability to stream music directly from smartphones and tablets using Bluetooth. We hope this helps to answer your question!
