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Select BT: What happens if my phone goes out of range?
7 Dec 2016 by Craig Walker

The KB Sound iSelect BT works via bluetooth which means there is an approximate range of 10m for the system to work. If you are streaming music from your phone and you leave the range of the master module then the music will stop playing. However if you are listening to FM Radio then there is a setting in the app's setup menu that allows the system to continue playing the FM radio even if your phone goes out of range.