Explorer Trade-in program

The original Glass Explorers are given a chance to upgrade their devices to a new version of the hardware. They must mail their devices to Google to be replaced:

We want to say “thank you” for all the amazing feedback we’ve been getting, so later this year, all Explorers will have a one-time option to swap out their existing Glass for a new one. This hardware update will allow your Glass to work with future lines of shades and prescription frames, and we’ll also include a mono earbud.