Hyperparathyroidism is where the parathyroid glands produce too much PTH. This causes blood calcium levels to rise (hypercalcaemia) and blood phosphorus levels to fall (hypophosphataemia).
Just two words: Quality and BlueTooth cannot be used in same sentence. The Sonos Play 3 is a very good sounding speaker for it's price range and is well made. You can't really compare it to a BT speaker as it really is much more. Your smartphone is mostly used as a remote for it rather than a source so your phone doesn't have to be on all the time you use it.
That means if given an option, always choose the device with the highest Bluetooth version. The main thing to note is that the flagship features of each version is optional; for example, a phone advertised as 3.0 doesn't necessarily have the HS capability, it should be advertised as 3.0+HS. Keep an eye out for that.