Geezer's favourite the Icon uses the hilariously named "NoiseAssassin 2.5" tech to effectively block out noise both indoors and out. as long as the 45mm long, 8g body is positioned correctly against your jaw. In lieu of volume controls, it automatically adjusts to external noise; in loud environments you may have to adjust the volume on your phone but generally it works.
A button press tells you how many hours of life are left you'll get a maximum of 4.5 hours. It supports multipoint and US users can access directory assistance, but we can't.