[Auto Focus]4K Projector.1100ANSI Outdoor Projector 4K with Wifi and bluetooth,Native 1080P Projector Auto 6D Keystone.50% Zoom.PPT.Smart Home Movie Projector 4K+ for Phone/PC/TV Stick/PS5

Y'all. It's not 4K. Don't even pretend. I mean, c'mon. It's 1080P display resolution. It may be able to downscale from 4K, but no one cares about that.That said, just know that for its price class, this thing is just amazing.I'm using a 14-foot diagonal cloth screen outdoors. I upgraded from a $50 Blusmart projector, and I got what I paid for on that one. It was only 480p, I had to crank up the color values to get enough brightness to barely suffice, and it was fine (but not great) as long as there were no other lights on whatsoever in the vicinity and the movie scenes weren't overly dark. And it couldn't quite fill the whole screen and stay in focus. I could move it closer and get a brighter and much smaller image, but that's lame.The Redeer projector is like a night and day difference. The image fills the whole screen. It's bright enough that the porch lights were on through half the movie and no one noticed. At 1080p, it's clearer -- SO much clearer. The colors are truer because I don't have to compensate for brightness. The fan noise is lower. My cheap projector threw some light out of the fan exhaust port, which was distracting; the Redeer doesn't do that! The Redeer is not as fiddly to set up -- because of the keystone correction, the projector can sit lower relative to the screen and doesn't block anyone's view. However, note that the keystone correction is digital, not optical, as it seems to be on all projectors in this price class. That means that once you deviate from a standard, flat rectangle, focus is no longer uniform; the center may be in focus and the edges may not be. It does also have auto focus and auto keystone adjustment, and it's okay, but it doesn't get those settings as finely tuned as I would like.I have tried the HDMI port with a laptop, and contrary to what the manufacturer states, there was a lag. I didn't measure the lag, but it was enough to make it difficult to click on things with the mouse. I didn't try all video modes, but there doesn't seem to be a "Game" mode to cut lag by disabling postprocessing.I've also tried the USB port. This is not a unique feature, but it's a really great one. I like a real movie theatre experience, with a trivia reel playing as people are seating, followed by some previews that I pick out for my guests, an authentic theatre policy trailer, the actual movie, and sometimes an intermission reel. People get a kick out of that. I can load up a USB drive with all the files to play, name them with numbers at the beginning of the file names, and it plays them in order. I saw another review stating that the projector will NOT play multiple files in order, instead returning to the menu after every file, the manufacturer couldn't solve the problem, and they had to return the projector! But there actually is a solution built in (at least on the latest firmware). This is how to do it:1. Start a video playing (paused is okay also).2. Press 3 lines button on the remote or arc + line button on the unit.Press Down to select Play Mode and press OK.3. Press Down to select Single, List, Single Repeat, or List Repeat and press OK.4. That's it, but the setting is not sticky, so you must set it again after powering off.The only drawback I've found with List play mode is that the projector shows the file name at the top and seek bar at the bottom for a few seconds every time it starts playing a new file, which is distracting and takes away from the authentic movie theatre experience a little.Also, the manual states that the USB drive must be formatted with FAT32, which would limit every file to a maximum size of 4 GiB. This is not correct, either; the projector can also read a drive formatted with NTFS.I use Handbrake to convert video files that I put on the flash drive and the settings I use are MKV format, H.264 (x264), 1080p HD resolution limit, framerate same as source, constant quality @ 18 RF, encoder profile high, encoder level 4.1, AAC codec for the audio at 192 kbps and a stereo mixdown. If you're running Handbrake on Windows, for the best quality audio, look for the mod of Handbrake that uses the FDK-AAC codec.I haven't tried any of the wireless casting features. Those are secondary value-adds to me. But I definitely will.The projector has an air filter that slides out easily. It looks like it could be cleaned with a vacuum, but it can't be disassembled and reassembled. If you ever need to replace the filter material or find a whole replacement years later, good luck.My one gripe is that the remote is required for basic functions. You can't even adjust the focus if you don't have the remote. You can go through the menus with the buttons on the unit and activate auto focus, but there is no way to tweak it manually. This is a pretty big oversight. The usual precautions apply: Take spare batteries with you if you're not projecting at home, and don't leave batteries in the remote whilst in storage.

Tl;DR: It's a good projector for a good price.I've gone through five different projectors (priced from $60-$1000) trying to find one that works for my living space, and this is the one I finally settled on.The good:- It really is true 1080P.- It's sharp enough that you can distinctly see every pixel if you come up to the screen.- With a 150" image, the sharpness is even across the screen.- There is no adjustable lens tilt. This is actually a good thing, as lens tilt tends to ruin the quality of the image.- There are two HDMI ports, a builtin DLNA server, and a decent audio output that actually turns off along with the projector.- Autofocus is surprisingly useful, when the projector isn't mounted somewhere accessible.- Colors are vibrant, blacks are dark, and the image is bright.- Customer support is responsive and helpful.- The UI is clean and intuitive, with the exception of the boot logo mentioned below.The bad:- There's a weird motto in poorly written English that comes up on boot ("plus joy in your life").- Boot times are a little slow.- Documentation is a little lacking, although the interface is intuitive enough that it's fine.- There is no hole for mounting on a tripod, although there are four holes for a proper ceiling mount.- With a 150" image, there is a little chromatic abberation but it doesn't ever go beyond the width of one pixel.- There is no manual mechanical focusing, and the autofocus motor moves in steps that are just a liiittle too big to 100% perfectly dial it in.- The digital keystone noticeably affects the quality of the image, even if you use only a little. This is pretty normal, but there are (usually much more expensive) 1080p projectors with better keystone algorithms out there.Overall, none of these seriously affect the experience.Some things to know:- This projector projects the image straight forward, so the device must be on the same height as the center of the screen. This may or may not work for you.- The door for cleaning dust off the LCD is hidden under the model info sticker on the bottom of the projector. I have no idea why this isn't in the manual. Mine came with a piece of dust on the LCD, and I was easily able to clean it off once I contacted support and they told me where the hatch was.Overall, it does exactly what I need it to. It's a solid product as long as you don't need the extra polish that you get from brand-name manufacturers.