Projectors are mostly used to watch videos and movies on a big screen, and most of the times these projectors come quite handy for presentations. In short, no matter how advanced we get, we still are going to need a projector at some point in our life, whether as a student or a professional. Now, we are pretty sure that most of you have used laptops so that you can connect them to the projectors and then give presentations but imagine giving a presentation on the projector without carrying a laptop? CHECK IT OUT BELOW!!

http://techmila.com/how-to-connect-your-smartphone-to-a-projector/

I read about projectors on a popular site. If the projector has wireless technology, then it can easily be connected to a smartphone or tablet via Wi-Fi.