edit: Okay, I just saw that they have Echo Buds too. So I guess this is only for people who already wear glasses, or prefer them for some reason.
"A single charge delivers a day of intermittent usage at 60% volume. Intermittent usage includes 40 Alexa interactions, 45 minutes of music, podcast or other audio playback, 20 minutes of phone calls, and 90 incoming notifications over a 14-hour period. Alternatively, a fully charged battery will last up to 3 hours of continuous audio playback at 60% volume. Actual battery life will vary depending on device settings, features utilized, environment and other factors. Fully charges in about 75 minutes."
That said, I was quite surprised at how good the sound was. I think the big problem is that the style options are quite limited. I really think there should be a partnership between Bose and Oakley... the later known for occasionally chunky styling and also modularity.
Personally, I'm happy wearing an Apple Watch, overlooking the fact that Siri needs a lot of work.