If you are streaming most music to this speaker, it will work fine. Anything with intermetant pauses like audiobooks however, will be a nightmare. Why? I looked into it and the answer is complicated.The bluetooth protocol has a feature where when streaming audio, the channel will ""open"" and ""close"" depending on whether or not sound is coming in. It makes sense because if your phone is connected but not actually spitting out any sound, why bother putting power into the actual sound-making part of the speakers? Just have the receiver be powered and wait for sound. Then once it detects ""oh hey, I'm getting sounds. Time to actually start making noise"" it opens and the speakers power up. The channel stays up until a certain amount of silence and then it goes back to sleep. The threshold for how much sound is required for it to go ""open"" and how much silence it takes to ""close"" again are both properties set by the manufacturer of the speaker. Not the transmitter, the receiver.In an effort to squeeze every bit of battery life out of this thing that they could, Amazon made the noise threshold high and the shutoff time small. That means it spends less time ""open"" due to false alarms that music was playing or extra silence after you're done streaming. In theory the result is more battery life as long as you are using it to stream continuous sounds.Here's the problem. If your music has spots of silence, or you're listening to an audiobook, these two things combine to constantly open and close the channel mid-stream. The opening is not instant, and so the first half second or so of the sound after the silence is cut off. With audiobooks, pauses are fairly frequent. That means INFURITIATINGLY, the beginning of nearly every sentence is cut off. Some small quips fall through the cracks entirely, and now the character in my book who has lots of one word replies is relegated to silence. Which was confusing before I figured out the problem.I want to be clear, this is not a feature inherent to all bluetooth technology in general. I have other bluetooth devices that do not do this. It is the manufacturer settings on this speaker specifically that do this. There are other culprits like car bluetooth audio as well, but most devices do not have this problem. Unless they're cheap and want to pump up their battery life via software without upgrading the hardware itself.For a lot of people, this will be a non-issue. This design decision will improve the battery life for like 95% of users, but for some specific users it will make it utterly unusable. I suspect this is a trade Amazon is happy to make, and I don't blame them at all for doing it.