But once you get it on correctly, audio quality is good, with great volume and clarity. We tested the headset on the Nokia 6820, the Motorola V600, and the Sony Ericsson T616. Volume was impressive, producing clear conversations on both ends. Battery life also was superior. Bluespoon promises a talk time of 6 hours and a standby time of 8.2 days. In our tests, we fell short of the rated standby time by just a couple of hours.