Finally, the teaser's over. The latest delivery to Engadget's UK penthouse is the Jabra Stone Bluetooth headset due out in the US on 8th November, and we took no time to extract the pebble from the transparent cylinder. In front of us are the two parts of the Stone: an earpiece of a breakthrough form factor that instantly makes you pity its rivals, and behind it is the accompanying portable charging base which serves as an external battery. The latter is equipped with a micro-USB port and an LED indicator -- simply green or red -- to show whether there's enough battery juice for one full charge. It's a pretty neat idea as this is the only feasible way to fit eight hours of talk time (or twelve days of standby time) into such tiny package: two on the earpiece and an extra six from the surprisingly light battery base -- our scale reckons it is just under one ounce. We also dig the auto-off function when you dock the earpiece and vice versa. Docking and undocking are pretty straight forward too: just snap in for the former, and poke your thumb through the bottom hole of the base to push the earpiece out. The generic click button hidden under the Jabra badge is easy to access and responds well. Above that is the invisible vertical touch strip for volume control and similarly it responded nicely to our strokes. What's left on the earpiece are the two LED indicators on the underside for Bluetooth connectivity and battery. So far so good, but what really matters is the ear-on experience and the audio quality -- listen for yourself after the break.