THESE DO NOT CONNECT TO EACH OTHER
925517
These do not connect to each other. It was a pain to use an extension cord and not enough outlets. I would never purchase these again.
1687841
They are good but  they do not connect to headphones very well
626781
These did not function as I intended them to or as I thought they would based on the description I guess if you're trying to transfer power from a male USB cord to another part of a male USB port and they may work but they do not allow for data transfer in any way
1565470
Tried two sets of these. Neither would update or connect properly.
533254
I bought these for my father-in-law for his camper. The biggest downfall to these is you cant connect multiple strands together.
4073051
Well, the concept ok but does not connect very easily I wanted to lated to return so I am stuck with them,  I will gift them I suppose to someone more patient.
2255038
I just got these in, and there are two things I noticed right out of the box. They do not have a middle break away cable design, so the 6 foot extenders I bought for them won't work. Also, the cable is only 6ft long. In this world of big screen TV's and all that jazz, I need to be at least 12ft away from my TV in order to not get a headache. Anyway, I will be returning these, and buying a pair from my local game store.
2008489
solder pads are not spaced far apart enough to make contact.
3792
The only way I could get all 3 of them setup was to have them side by side.  Then when I would spread them out, they would lose connection, even though I could literally see the other one.
657444
I really wanted to like these, but after they (finally) arrived, they were not exactly as described.

The behind the neck "strap" is really just a connector for the two hearing protectors. It will not stay on your head unless you use the Over the Head Strap, which is not in the product description or picture as of March 2010. Having to use an over the head strap defeats the purpose of getting ear protectors that are behind the neck instead of over the head. The one and only mention of the over the head strap is in the directions for putting on the ear protectors where it tells you to secure the velcro the strap over your head. If this had been mentioned or even pictured on the product page I wouldn't have tried these.

Additionally, the ear protectors interfered with using safety glasses--wouldn't let them sit normally on my face so my eyes weren't completely protected. This doesn't happen with normal over the head protectors (which I'll be ordering to replace these).

I'd like to give these a good review, but they aren't usable for me. They could work for someone who just needs them for studying--if they don't mind a dual behind the neck and over the head system. They do not fit like behind the neck earphones that you can use with an mp3 player or an iPod.
1364763
Does not connect to my phone which is the primary reason for buying them,  but will connect to my tablet.
648484
I bought three bulbs for my bedroom overhead light.  When I first installed them they all connected via Bluetooth flawlessly.  Within a few hours I was having connection issues.

Right now my phone is on my desk (6 feet below my light fixture) and only 1 of the 3 bulbs is connecting.  If I stand up and hold my phone to the light  fixture they all reconnect, but when I sit back down at least 1 or 2 of the connections drop.  I am going to return these in the next couple days unless I hear back about possible causes/solutions to my issue.  These are cool bulbs and the app itself is nice but the connection issues ruin the purpose.  My iPhone 6 is 1.5 years old so I don't think it is a device issue but it is possible.

Update: Rotating the bulbs seemed to fix this issue, so I have increased my rating to 4 stars.
2542001
They seem to be of good quality but they do not make proper contact with the USB C ports on any of my devices.  any slight deviation from straight on and the connection drops.  also feels very loose in the port.  My Essential has this issue as does an LG G6 and a Galaxy S9.  cables are nice because the varied length comes in handy for different applications (like in the car for android auto), but the lack of proper connectivity drops it 2 stars for me
2414988
I'm sure these work like gangbusters and are gorgeous to behold when lit up.  However, I never got that far.  See I was led to believe I could connect multiple sets of these together, which was my plan for my patio.  I guess technically that is still possible to do, if you are a licensed electrican or a thrill seeker who dabbles in electric danger.  But seeing as how there is only a plug on one end of this fine product, the rest of us regular folk are plumb outta luck.  I had the first strand all secured and ready to connect to the second when I realized there is no way to connect it.  Now why would I assume I should be able to do this?  Hmmmmm.  Could it be...this!

"End-to-end plugs accommodate multiple strands of lights (other light sets sold separately)"

That is a direct quote from the Product Description.  I don't know if that's Amazon's goof or the manufacturers goof, but somebody goofed.  Needless to say, they will be going back.  Too bad to.  I bet they would've looked nice.  And if we can't belive Amazon.com product descriptions anymore, then I don't know what to believe.
418324
meh...they don't stay connected very well and fall apart all the time.
1913490
The ear piece doesn't want to connect at all I don't know if it's pressure in between the two pieces but they won't connect
2954424
It may be the led strips I got, not to sure.  I ended up removing these and soldering wires instead.  These just wouldnt keep a solid connection.