Bose Launches SoundLink III Portable Bluetooth Speaker February 7, 2014 Share FacebookTwitterWhatsAppLinkedinReddItTumblrTelegram Bose has introduced the SoundLink Bluetooth speaker III. The SoundLink III weighs three pounds, and includes a rechargeable lithium-ion battery that provides up to 14 hours of listening. The new speaker retails for $299.95. [Image courtesy: Bose]