all persons are talking each other and showing  a digital letters on their t shirt
a man in black talking about a particular i phone 
a man showing mobile screen on people t-shirts
there is  an experiment  is going  on the boy t-shirt
there is a man projector his t-shirt and written on that
a man with an accent is discussing an app while showing video of him talking to people as words appear on their shirts
man with iphone is talking about it with showing some instances
the person talks about the introduction of the  latest technology in mobile phones
a man wearing black color dress ia talking with another man
this man is describing a new technology that portrays our thoughts for all to see
a person with black shirt holding the mobile and explains how he reads about a person
an indian man talking about iphones and a new type of clothing
a man in a brown shirt holding a cell phone explaining how a feature works
a man in black stands in front of colorful fabric during lecture
a man wearing a black shirt describes a science project
a man wearing a black shirt talks to a crowd of people
person in black shirt is talking with other person in a office
a boy in black  dress wearing cloth standing speaking and two boys standing displaying on screen
a man in black on a colorful stage gives a lecture about and technology shows various people meeting each other with identifying words floating in front of them
guy in black shirt talking to the camera