Annoying metal clanging!
937059
I have prime so shipping was fast. I was able to get it put together in ten minutes and everything I needed was included. I gave this 2 stars because the part that folds contains a metal piece that rattles and there is no way to fix it without ripping the cushion open. It's cheaper and easier to just keep it since I live in a 3 story walk up.
4007534
Not suitable for hunting situations. Makes loud clicking noise when in use!
4462878
Ceaseless ticking/rattling noise occurs with this timer. This  is not worth the madness that rattling noise causes anyone around it (I can hear it from upstairs in a two story home...
4127399
No matter how loud or soft I put the volume of the speakers, it makes a constant "thudding" noise every couple minutes. The noise is very loud and it sound harmful for the speakers so I try not to use this as much.
The speakers sound great though - aside from the thud sounds. (I may edit this post to describe the thud in more detail)

EDIT: The noises are more of a popping sound (very high pitch and annoying)
1390203
The timer is easy to set up, works well, and has a nice look and feel; however, it makes continuous rattling noise, which I find more annoying than other background noises (such as a fridge or a computer fan). The noise is relatively quiet but still irritating. When I am sitting in ten feet from the timer, it is just on the edge of the hearing, but still enough to be uncomfortable.
559687
This works just fine and does what its meant to do. My complaint is the design. literally less then a week of using it, it began to make a metal on metal screeching noise whenever I opened it. The noise was so unsettling, I tried everything to fix it & nothing helped.

I finally ended up buying the official keurig model from bed bath and beyond, months later its still quiet as a mouse.
3480035
It make a high pitch screetch sound when you manually lock it from the plastic pieces rubbing together! Really? Had to spray it with silicone spray which only helped for a day and it started doing it again.
4660053
This frame have nice support with the 10 legs and looks nice. On the other hand, the bars that support the mattress, 6 of the 12 pieces labeled as 5a, don't "click" at all to the side frames, they continue to "pop up" and makes this annoying metal noise every time my daughter moves in her bed, because with the weight, they click down, but when there's no wheight's over each one of it, they "pop up" again and again... There's NO WAY somebody can fall asleep hearing this loud metal noise everytime you move. Please I need a solution for this. This frame took me hours to figure it out how to mount it. You don't get instructions, you get drawings. Despite the mounting, Everything could be perfect without that damage bars. In the pics you can see the "raising (pop up) bars", that are supose to click and stays firmly down.
771279
Should have listened to other reviewers. The "whining noise" is there even when you're playing something. Connecting is no problem. My iPhone doesn't automatically connect which is kind of annoying. I'm not sure if this is the case with other hands free bluetooth kits. But that whining noise is unbearable and I actually just reverted back to my Aux cable.
1561075
My mother in law gifted 2 of these NOISY pieces of junk to my wife.  Setup was super easy with her iPhone.

The PROBLEM, is that both of them have made a high frequency noise that is extremely annoying.  What I gather is it is running some sort of relay as part of its hardware inside the casing.  When your device is flipped "on" the noise goes away, but it's annoying as heck when it's set to off, that is when the annoying noise happens.  If your setup is like ours and you have a surge protector next to where you sit or sleep, you will hear it.  If at accords the room you won't.

Probably not an issue for older people whose hearing has naturally declined but for young people and kids it's EXTREMELY aggravating.
965896
Its so beautiful, but the sound it makes is HORRRRRIBLE. loud and obnoxious. sounds like banging glass around.
3207920
loud vibrating noise and cheap plastic.  Unusable for me due to the noise. Spend 3-4 dollars more and go with a metal one that doesn't make annoying sounds.
1446818
Makes an annoying popping sound if u shake the camera with the mic on
2887271
I got such a great deal on this with the Amazon Lightning Deal... so I shouldn't complain.  However, this almost lost a star for me because of how LOUD this can rattle if a dog should stand up and wag his/her tail... just as my dog might do in the middle of the night.  She's an active pup.  I don't think that this crate is supposed to be silent, or that any other crate is probably silent... but I still feel that this is a downside. My solution for this was to take a small sheet of black craft foam and black duct tape and wedge the foam between any moveable bars and tape around those wedges.  It was visually undetectable. It's a LOT quieter - PHEW!  Everything else is great.  Nothing has broken or bent or chipped or anything.  It's great, and if something were going to break, it would have by now!
264875
The problem lies in the cd player.  If you are listening to quiet music, there is an overbearing noise from the unit, weather a bad bearing or poor design.  It sounds metallic in nature.  I tried two independent units and they both exhibited this metallic rubbing noise.  If all you listen to is loud music, this is good for you.  If you listen to classical, etc.  Stay away.
231941
Good lightning but annoying buzzing sound that gets louder over time.  Not buying these again.
4882148
The squeaking and clicking sounds are driving me MADDDD!!! Tried to WD40 this thing ,but alas the sound doesn't want to leave me alone. This mouse will look great on my shelve and that's it. Not planning on using it anytime soon.

NOT WORTH THE MONEY

UPDATE: Changed review from 1* to 4* for good post-sales support
The owner just reached out to me regarding my feedback. I believe to have received a defective unit. Customer service offered me a full refund for my item or the option to get a new (tested) one that does not click/squeak  - the owner proactively reached out to do everything in his power to satisfy an unhappy customer. I thank you for that. We need more sellers like that.