Had to bend, stretch and cuss to get this thing to not wobble and work. When in wireless mode both the mic and headphone sound quality diminishes noticeably when in phone calls or with usage on the computer. If you are used to other extra cushy acorn slipper, you will be disappointed with the feel of these. I just bought this key holder and just now tried installing it. They have TERRIBLE sound quality. They touched the hardware a bit and it helps. Will test more as I use it longer. My rear bike light stopped working, I had these arrive same day and used them for the last 3 days, they are well made, very bright and I?ve ridden home in heavy rain and still working! So I turned off the VolTE service in the phones settings and now there is no trouble making calls. I own all generations that samsung came out with I have sennheiser both of them too, Sony, Jabra, etc and we all know the premium prices we pay for them but when you pay the current price and realize they perform better than my samsung that are 3x-10x the price it makes me wonder.