Designed to create intimate screenings any time, any place you can set up visuals for a house party, play cartoons for the kids or watch music videos with your friends. No additional power required. Silicone grip pad to hold smart phone. Fits phones up to a max size of 14.5 x 8cm / 5.7 x 3.2 inches. The smart phone projector makes a fun DIY project, you just need glue or double side sticky tape and about 10 to 15 minutes. Please turn up your phone brightness to 100 percent and for maximum effectiveness, use in a dark room and project onto a smooth white surface. To reverse a screen on smart phone, just download an app.