"Aliph's New Jawbone Bluetooth headset delivers the highest sound quality in Bluetooth headset performance. The first-generation Jawbone and its speaker gave a fuller sound to its user than this second-generation version, but the difference in the New Jawbone?s size, style and comfort may outweigh what really is a minute sound difference. In any event, put the New Jawbone up against a competing device and Aliph's sound achievement will win ? we have no doubt."
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Source: BlueTomorrow