This is OLD VERSION!! Please check revised version: http://www.batchpcb.com/index.php/Products/41342

This unit measures air speed, air flow direction and absolute altitude with gauge and differential pressure sensors. The specifications are summarized in http://fenrir.naruoka.org/archives/000779.html (in Japanese, but if you have any question, please leave comments). In addition, this unit is one of components of Tiny Feather, an autopilot system of small UAVs.