Back in October, Google announced the first hardware revision of its Glass product and that it would be available to current Explorers this year. Tonight, our own Seth Weintraub received his invitation to reserve the new revision of Glass for himself. Users who receive the invitation have until February 5th to make their decision on whether to upgrade or not. Should you choose to upgrade, you must fill out the form from Google and choose what color you would like the unit to be. The process is on a first-come, first-serve basis, so don’t wait too long to make your decision.

Once the updated unit is available, Google will send you a return box and return label for your original pair of Glass. After you send it back, your new and improved unit should arrive within a 3-5 days. It’s unclear when exactly Google will begin sending out the return boxes to Explorers.

As far as what’s new with this hardware revision of Glass, Google says that these units are made to support upcoming prescription lenses, and also include a new mono earbud.

Glass users who purchased Glass before October 28, 2013 are eligible to upgrade their units, so be on the lookout for an email to hit your inbox soon. Read the full invitation after the break.. expand full story