A new technology in mobile which is first introduced by lenovo smart phones. I ordered from flipkart which cost me Rs.350/. Viewing angle is good, you feel like it is happening around you, transform you into another world but the video has to be 720-1080p. After watching for an hour my eyes started mild paining & afterwards water comes out & I never used after that.
Overall experience is bad. I will not recommend to anyone as eyes are precious than anything. Dont look for cheap items go for a branded one.