What we've know:
- There's a mini tube inside and you can see it glow!
- It lasts for about 10 hours per charge
- Very powerful, enough to make a K1000 sing!
- Minimum microphonics on most Headphone, they worked hard to get the kinks sorted!
- Pictures and some impressions here: http://www.head-fi.org/forum/thread/562045/govibe-porta-tube
The rest you can find out by yourself!
Includes a charger and an internal rechargable battery