Google Glass was an optical head-mounted display designed in the shape of a pair of eyeglasses. It was developed by X (previously Google X) with the mission of producing a ubiquitous computer. Google Glass displayed information in a smartphone-like hands-free format. Wearers communicated with the Internet via natural language voice commands. Google started selling a prototype of Google Glass to qualified “Glass Explorers” in the US on April 15, 2013, for a limited period for $1,500, before it became available to the public on May 15, 2014. It also had a camera attached to it.
The headset originally received a great deal of criticism and legislative action due to privacy and safety concerns. On January 15, 2015, Google announced that it would stop producing the Google Glass prototype.