SAN FRANCISCO – Google is making prototypes of its futuristic, Internet-connected glasses available for people to test out.

The company is selling the device, known as Project Glass, for $1,500 to people attending its annual conference in San Francisco for computer programmers. It will ship early next year and won't be available for sale outside the three-day conference, Google I/O, which started Wednesday.

"This is new technology and we really want you to shape it," Google co-founder Sergey Brin told about 6,000 attendees. "We want to get it out into the hands of passionate people as soon as possible."