This FAQ answers is there a maximum number of devices that can be paired with the CoolStream Duo.
Update: as of 9/22/2014 the CoolStream Duo has been upgraded to include Multipoint Technology which allows for two mobile devices to be paired to the Duo at the same time. Simply follow these instructions.
How do I Connect 2 Mobile Devices at the Same Time – (Multipoint Technology) if I bought my CoolStream Duo after 9/22/14?Continue reading: Maximum number of devices that can be paired with the CoolStream Duo?