It's a mini smartphone projector. Just place your phone inside, adjust the distance and size of screen and you are ready for big screen movie!! The projector has an ultra sharp lens that magnify your phone screen. Comes with a sticky pad for your phone so your video is always stable. I bought on impulse and not of much use to me. Selling at cheap price of 30sgd!! https://www.amazon.com/Smartphone-Projector-Cardboard-Portable-Cinema/dp/B01MT9AI4N They are selling at 42 sgd without shipping cost, without the anti slip mat.