TV is growing more and more radiation, the child's vision is getting worse. How should we deal with? Koolertron Portable Projectors help you solve these problems easily, and bring you a home theatre to enjoy big screen viewing experience. If you want to watch movies, you just need a U-disk to connect the projector. If you want to watch TV, you can connect to TV by AV cables. Moreover, they can be a good helper on your business trip. Convenient and useful, why not take one home.