Its a cardboard box around a TV with a fresnel lens on the front.
Dont buy it.
Go to Lumenlab, they will show you the way.
These are REAL LCD projectors you can make for $350 ish and have better projections than many $1k+ commercial units.
Here is a projection using my lumenlab projector, on a crappy painted brick wall no less. Image width is about 120" diagonal, you can see my 2001FP in the corner there.
