I have long considered buying an external monitor for use with the Sony A7 RIII. If you have a camera without a pop-up LCD viewfinder screen (Sony has a pop-up screen but it's not visible from the front) you really can't see what's going on when you're recording yourself. It fits in the camera's shoe so you can see it right where you can see it. First of all, be prepared that when you order it, there is nothing in the box to power it. It would be great if at least one power supply was included. Luckily I had an old cable laying around that would work with it. I will definitely be buying some batteries in the future but I mainly use it for recording in my office so it works great. I also needed an HDMI to HDMI micro cable and luckily bought it for another device. I tried just using the monitor itself, which was my basic need, and also used it with the OBS software on my Mac mini. I've had some issues with editing on Mac mini, but I'm afraid it's related to my M1 Mac, which may not work well with these devices. I have a mirabox that only captures video and has the same issue on a mac but works fine with a windows laptop with the webex software installed. On Webex they work pretty much the same with very low latency. There is no information about the manual in the brochure. However, there is a PDF link on the Revain page. However, this is entirely understandable. It has a few menus that many will find useful, but the important thing is that if you want to send a signal to a computer, you need to enable this USB feature. It is disabled by default. Additionally, a long press of the power button toggles the touchscreen feature on and off. That was the main reason I started looking for a guide. I found the image quality on the monitor to be very good. I can see if something is sharp or not. For my typical needs, it worked perfectly right out of the box. I also like the touch controls that make it easy to navigate the menus. While the build quality is all plastic, it also means it's lightweight. I can just throw it in my bag and hardly know it's there. While I don't really need the USB output feature, I suspect a lot of people will like it since a lot of people work from home and use Zoom and other software. That means you don't need a separate device just to fill that need. Of course, if that's all you're using it for, you can just get a USB without a monitor, but that's a one-size-fits-all solution. In general, for my needs, this is what I was looking for. . I can use the screen to see if subjects are sharp and centered when filming myself, which is the one feature I really miss on this Sony compared to cameras with screens that flip out to the side.