I've got a few of these for each room, but they're not as quiet as I'd hoped (pretty much like any other filters of this type and price range), so instead of having them in all of my rooms, only kept them in 2 rooms where they're most needed and selling the ones I no longer need. There is a very quiet sleep mode, but it's moving the air too slow, so I don't think it does much, unless you set it for higher speed, which is more noisy. So, realistically it can be comfortably used in the room while you're not in it, which is how I use them. Will add actual photos when I get the time, but I just opened them and never used really after testing, so they're like new with all the packaging included.
