Review on WiMiUS P18 2021 Upgrade LED Movie Projector Native 1080P 4K Compatible with WiFi Dongle Bluetooth Transmitter, Amazon Fire TV Stick, Laptop, iPhone, Android, Xbox, PS4 Via HDMI USB VGA AV - Support for 400 Feet Projection by Steve Albright

Hangs from the ceiling 15 feet from the wall. Keystone distortion seems to make the screen uncomfortably blurry with the slightest adjustment. Therefore, the projector must be installed exactly in the center of the screen. In my case it's 5 feet off the ground. I would rate the fan noise a 6/10, with 10 being the loudest. I'm thinking about soldering some silent Noctua fans. The unit comes with a filter on the intake fan, which I liked until I saw dust particles on the lens being sucked into the projector. This tells me that the filter is blocking some of the airflow while the fan is blowing freely, creating a negative pressure inside that sucks dust out of cracks and crevices. I would recommend replacing the exhaust fan and setting it to 75% or installing a filter to allow for better airflow and positive pressure. So far I've only seen 3 movies about it. 15 feet from the wall I have a 150 inch screen. When you're watching a movie on a four and a half foot screen, these tiny speakers leave a lot to be desired. To watch the film, they were inappropriate, to put it mildly. I just tried a few different video formats from my USB drive, one of the formats where I got the image with no audio was .mkv. I think I have audio on .avi. I am satisfied with the picture, it will suit my needs. With a 150 inch screen, I can't see any pixels beyond 6 feet from the screen. Let it be known I don't have the best eyesight. The brightness seems great for my living room that doesn't get outside light. Your mileage can be very high. Among all Chinese 1280x800 projectors, choose one of the sellers willing to back the product with a warranty provided by the seller for one year after purchase. This is my first projector and I'm glad I bought it.