Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: what kind of batteries does this thing take?
Document: After being used to military PVS-7/14 units...this thing is crap, but probably because that's just Gen-1. Technically it works, but not without an IR light source. The built in illuminator actually glows a visible red. You get a kind of fishbowl effect looking through it and you have to adjust the focus alot. But, it does give you the capability to see in the dark.
Ok, we'll these are my very first nvg's. I wasn't really expecting that good of a product because of the price, compared to gen 3's. this product is way better than I thought it would be. The headgear is a little tight. And there is a fuzzy spot in the middle of the lense piece, but the range on this thing is amazing. You can see clear past three hundred yards on a star lit night.
It's not bad. The head harness sucks horribly. The unit itself is not bad, however the brand new lithium batteries were completely dead in 1 month, with NO USE. That may be a battery choice problem... checking it now.Good value for the price, however the mounting threads are plastic and very shallow. This will most likely strip out, if the unit is bumped hard while attached to anything. You also can strip it by tightening too hard, which is a very good possibility.
seems like it these should be a bit more effective for the price. I think the 50 kids ones work better. very narrow field of view. got this for airsofting, just not as helpful as I would have thought, but I suppose the alternatives are much more expensive sooooo....
You will pretty hard pressed to find another gen 1 night vision device for the same amount of money or less. My only complaint is that the focusing ring can stick a little bit making getting the unit in focus a little frustrating at first. The head mount fits tight on my head and is easy to adjust with very small amounts of wobble. To stop the unit from wobbling I applied a small thin strip of electrical tape on the unit where it meets the head mount.
Without the illuminator, it is pointless. I can see at least as well with my own eyes as I can with this device with the illuminator turned off.I gave it 4 stars because it does meet my requirements for a fraction of the cost of the newer technologies.
Very nice, better than my soviet gen 1. Still not a FLIR or anything like that but will improve night vision, especially with no lights close range or with a ir flashlight. I upgraded the lens for a 4x and it is awesome to use in open field. I feel the image is very crisp. The head gear is nice, works great although it is a bit tough t adjust it and wear it, but it is functional. It seems like a good NVG at this price range.
The sightmark ghost hunter night vision goggles set is less useful than a handheld camera's night vision. All you'll see is a blob which requires you to constantly try to focus image. Without the IR turned on the goggles are useless you'll be better off just trying to see on your own. As it stands these goggles aren't worth the asking price. So save yourself the money and skip on these....
The quality of the monocle is amazing, but an unexpected problem was determining downhills, only looking through one eye takes that ability away.
So far, in fact, that the torch outpaces the capabilities, in terms of "recognition distance", of the NV device itself.This is a very good entry level investment for the concerned citizen. And, the rifle mount and IR Torch are still useful for whenever I can afford to purchase a higher end PVS and this one becomes my extra and/or backup device.I have plenty of operational military experience using all manner of devices - this is worth the money.
Answer: no