The CoolStream BOOM! includes Multipoint Technology which allows for two mobile devices to be paired to the BOOM! at the same time. Simply follow these instructions.
How do I Connect 2 Mobile Devices at the Same Time to the CoolStream BOOM!? (Multipoint Technology)
1. Pair device number 1 per the instructions under (Connecting the CoolStream BOOM!Continue reading: Maximum number of devices that can be paired with the CoolStream BOOM!?