http://jet.reconinstruments.com/

Jet is a powerful wearable computer with a full-color, wide-screen
display, designed for active outdoor use. It unobtrusively delivers relevant
information, such as speed, distance, and duration at a glance, enhancing
athletes' performance and safety. With connectivity to smart phones and sports
sensors, and the ability to run 3^rd party apps, the possibilities are endless.

Jet comes mounted on high-performance polarized sports eye ware, weighing a mere
60 grams.