From TheVerge:
But walking around outdoors proved that the Bluetooth connection is still frail. I had trouble streaming music with my phone in any of my back jeans pockets. … This would also help explain why the main Facebook group for Dash users is full of conflicting reports regarding these Bluetooth woes — a lot depends on the environment you’re using them in, and how you use them.
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“Say you’re taking a train through Newark, there’s a magnetic transformer station that you pass on that train and you could experience a [Bluetooth connection] drop out there.” – Bragi CEO Nikolaj Hviid