They are almost perfect for the needs, I use them for pink noise (slightly more bass than white noise) in the bedroom - one on each side of the room.1. You can't set up two of these on the same device using Bluetooth - that was my plan, but I had to use a Splitter2 audio connection instead. When I use one to listen to music over Bluetooth, it's like using headphones - half of the song is missing because there's no right and left speakers and they're not configured to combine the two - this is a big problem since you don't need to translate your device to "mono" just to get the full sound - but that's the point. If you use the audio jack, you will get full sound.3. I could never know if they were waterproof because I always connected them with a cable.4. I have no idea how long the battery will last because if I plug in an audio cable I might as well leave it on the chargers.5. The sound quality is good when using the audio cable. Unpredictable over Bluetooth. I'm not thrilled with how I had to set them up, but they work for what I need - I wouldn't recommend them to anyone.
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