D40 Standard Projector comes with 16000:1 Contrast Ratio which gives a UHD Picture quality
D40 Gives 50,000 hrs lamp life under dynamic viewing mode however it can also give upto 70,000 hrs under ECO Mode
It can be mounted with ceiling mounting stand , however person has to purchase the ceiling mounting stand separately as it does not comes with mounting stand
It can be mounted on the normal tripod stands as well
Yes, this projector has several projection modes and one is for mounting on the ceiling upside down. Quoting from page of the manual, this mode "flips the image over top-to-bottom to project upside-down from a ceiling or wall mount."
Sketra Projector's are sold exclusively on sketra.com to keep the quality and the price best