Google glass is a "expand reality" glass pronounced by Google in April 2012,it has the same functions with smart phones,it is able to take photo,make video calls and navigate via voice control,it can also be used to surfing the internet,editing and sending emails. Google glass is a "expand reality" glass pronounced by Google in April 2012,it has the same functions with smart phones,it is able to take photo,make video calls and navigate via voice control,it can also be used to surfing the internet,editing and sending emails.