ViewSonic X1-4K Pro True 4K HDR Smart LED Projector with Built-in Google TV, 2500 ANSI Lumens, 240Hz, 4.2ms Low Input Lag, Auto H/V Keystone, 60000 Hour LED Life, for Home Cinema & Gaming

If you want to use this (X2-4K model) for gaming to take advantage of the low input mode then do not buy it unless you can ceiling mount it perfectly or your screen is very low to the ground (so that projector won't be in your line of sight when using it) If you need to use keystone, digital zoom or corner adjustment to get a proper image these settings will be reset when low input mode is activated. The manual mentions some things will be reset such as zoom and overdrive but does not mention keystone correction. As the projector has to be lined up perfectly it is very limited in terms of placement and was totally unsuitable for my needs so I will return it. I wish manufacturers could be more open about the limitations of their products, if you list multiple selling points but they cannot be used together (eg, project image from any angle, low input mode, image correction) then there should be a way to know that before purchasing. Seems to be the same with other models as well such as PX749-4K although this was at least stated in the user manual for that model