Google has reportedly increased the number of early-adopters to whom it is offering Glass.
The tech giant has already been trialling the wearable technology with its 'Glass Explorers', but has allegedly decided to increase its pool of users, according to the Telegraph.
It reports that the offer to buy Glass - initially for $1,500 - was made to attendees of the company's developer-focused I/O conference, then to friends of existing owners before the latest expansion to customers of Google Music All Access.
The email offer apparently links people to a sign-up page, stating that they must pay for the device - though no price is made clear - and be willing to pick up the tech from Los Angeles, San Francisco or New York.
The wearable computer is operated via voice commands, with a small screen just above the right eye serving as its display, appearing much larger in the user's peripheral vision.