I didn’t have high expectations for this monocular after buying others of leading brands in the same price range. I just figured I was going to get the same quality of image with the bonus of a flip out screen. I was very wrong and am completely blown away with the detailed image of this thing. The ATN OTS (which I had high expectations for) is in no comparison to the teslong as far as image quality. The only thing I dislike about it is the Teslong is it’s built and feels like a camcorder. Its shell is plastic so be careful when your out hunting with it. You’re basically substituting durability for image quality. The thermal abilities of this are far better than any of the leading brands also under $1000.

This monocular works exactly as described. Easy to see objects and easy to work. Well worth the money.

So I'm not a hunter or anything and my use case for this is somewhat particular. I do a lot of testing on handheld devices and like to understand when they're getting hot with the temperatures are. So I use this to do testing for those giving me an idea of which part of the handheld is heating up and showing me detailed information around that information. It also makes it easier for me to capture and use this in my videos. That being said from what I can see this is really meant to be used for other use cases. If you're some kind of professional like working out and plumbing or heating or you're out there hunting I can see how this would be very valuable. This is an expensive product but you do get something that I think is very well made and high quality. It is also very simple and easy to use giving you a lot of information to something that normally you wouldn't have access to without a device like this. I have no idea how this compares to other brands because again this is not something that I've a lot of experience with. But for someone that's never used a device like this I can say that it was easy to set up and get going and I'm very pleased with the results.

Let's make something perfectly clear. This is not a good quality thermal imager. If you're not familiar with how much these things normally cost this unit may come across as expensive, it's not. You're looking at about 3.5 grand USD for entry level. Good quality name brand thermal cameras of this style usually start around 4 or 5 grand. Most will also probably be expert restricted. And this and it's not even in the same universe of performance.  But to my absolute surprise and delight this thermal imager is a lot better than I expected it to be. As long as you come into this with realistic expectations about the performance and stats for this ultra budget option, I think you'll be pleasantly surprised as well.The main limitations of this device are pretty predictable. Slow refresh rate, limited resolution, digital zoom, a very small field of view, and manual focus that's only adjustable with a separate easy to lose tool. Or to put it another way, poor image quality, that's slow to adapt or adjust, that gets progressively worse as you zoom in, you can't see a lot with the camera, and you need a specific somewhat fiddly tool to get a clear image. It's also optimized for right hand use. When it comes to the focus ring in particular, the instructions do mention its inclusion and the diagram does show it installed on the unit. But both neglect to mention that the removable focus tool is the little knob looking thing at the back of the unit underneath the eyepiece. Which the product videos strongly suggest is related to the non-serviceable battery compartment.But if you can overlook those limitations, you'll find that there are some appreciated little details. For one, there is an included Class 3R green laser just above the lens, it's not slaved to the center cross hair of the camera but it will give you a good idea of what you're pointing at when you're trying to set up a shot. It could also be turned on with a physical button (short press of the power button) or it can be toggled on in the options menu. The flip out view screen is small and has a limited resolution as previously noted but it is 180° rotatable. Though I will note that it does disable the small screen in the eyepiece, so you can't use both at the same time. I also really like that it does have a 1x zoom option. Which may not seem like much but a few of the other ultra budget thermal imagers I've tried, tested, or reviewed had 2 power as the lowest option. Lastly, as a glasses wear, I was happy to find the inclusion of a diopter dial on the side of the unit. It could do with being repositioned to somewhere a little bit more natural but once you get it set you likely won't be fiddling with it a lot so it's an acceptable slight inconvenience.The real standout is the menu and settings. In addition to the standard zoom and FLIR style color palette options you have an unusually large amount of adjustment options for temperature tracking and temperature ranges. Some of the commonly misunderstood features have short disclaimers to educate how to best use. None of these are groundbreaking, and the settings and more can be found on most good quality units. But I was surprised to see them on a unit of this quality level. The in-unit menu is also surprisingly intuitive and easy to navigate. With clear easy to understand text and icons. Lacking the eccentricities of navigating menus found on most foreign-made cameras (thermal or otherwise).The instructions were also a shock. It's mostly written in correct English with only a few misspellings and grammar errors. Less errors than the misspellings and grammar errors you'll find in my reviews! The instructions are also informative, giving a basic overview of some of the nuances of thermal imagers that many newcomers lack. As an example it does walk through some of the advantages and disadvantages of the different color palettes most of which are renamed FLIR pallets. It could do with a little bit more information, as an example it does correctly mention that thermal imagers don't work through glass but doesn't mention the more common misconception that thermal imagers can see people through walls (they can't). But at some point customers really need to do basic research on their own.As I mentioned in my second paragraph, image quality isn't great. But if you're just looking for an affordable and approachable device to play around with I think you'll find that the image quality is good enough. Just don't expect a profound level of detail. The product video and instructions do claim that this device can be used for hunting, SAR, and surveillance/defense applications. As someone who has professional backgrounds in all three of those things, I would respectfully disagree. Device durability, field of view, image quality and refresh rate are just too slow to keep up with the more dynamic environment. Instead use it as a fun little tool for more sedate activities.

This accurately detects heat at night. It works well in the woods and is well made and portable.

I have used thermal systems owned by friends on multiple occasions. Some of them are very high end. Based on that experience I am super pleased with this system. It works as intended for me. It is easy to navigate the buttons (the hand strap could be a little more snug). I love the flip-out screen which is super convenient doing overview scans. The quality of the image is adequate and sufficient. Overall the price is a bit high for the quality and range of features, maybe because of the flip out screen, but I do not regret owing this at all.