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.
Plantronics Headset Compatibility Guide. Plantronics Voyager 510, Voyager 510S and Voyager 510SL Bluetooth(R) Headsets were awarded Nortel Compatible Product designation through interoperability testing on various models of Nortel desktop digital or IP phones. The Voyager is the first wireless headsets in the industry to gain such status.