< 25db support 1080p and 4k video decoding. Screen projection display, optimal projection distance portable makes outdoor projection easier. Automatic correction automatically correct the skewed image,so that youcan get a square picture every time vou proiect. 180°flexible projection angle projecting where you want find the viewing angle you need.by lightly adjusting the bodythepicture can be transferred from the wall to the ceiling. Convenient screen mirror one click connection to bluetooth devices such as mobile phones, tablets, and laptops easily play games, view photos and display office documents on the big screen.