Bose SoundLink Series differences and disambiguation Tech 31/01/2014 Audio Bose SoundLink Series and product range For disambiguation, differences between Bose SoundLink Wireless Mobile Speaker and SoundLink Bluetooth Mobile Speaker II: Bose SoundLink Wireless Mobile Speaker (2011) One piece cover This would be Series I Bose SoundLink Bluetooth Mobile Speaker II Bi-fold cover, in nylon or leather It has been reported that Bose adjusted the Digital Sound Processor for a wider sound field and improved bass response. This is Series II Bose SoundLink Wireless Music System (2009) Bigger than the Mobile versions Bluetooth enabled Optional rechargeable battery That would be Series I Bose SoundLink Air Digital Music System Airplay enabled Optional rechargeable battery This is Series II Bose SoundLink Mini Bluetooth Smallest SoundLink speaker Considered to replace SoundTouch Mobile