Google Glass is a wearable computer with an optical head-mounted display that functions as a hands-free smartphone accessible through voice control. The beta version was released in May 2014 for $1500 to US citizens aged 18 and older. Google Glass has six main features, including sending texts, recording 720p video/photos, maps, navigation, and a touchpad. It connects to a mobile phone via Bluetooth as it has no hard drive. Google Glass is revolutionary but still has limitations, though future versions may expand its capabilities.