I was about to get this over with and sent it back because they don't fit my headphones. I decided to go through the comments/reviews first and found that the little "switch" button under the pairing button is actually meant to toggle the device between RX and TX modes. I pressed the button to turn on the blue light and went back into pairing mode. I was then able to pair it with my headphones with no issues. The sound quality is great and I didn't notice any lag when using it with my PS4. The main reason I couldn't give this thing 5 stars is because it should have been. It took me 30 seconds to unbox it and plug in the headphones, but instead I spent 15 minutes trying to figure out why they're not connecting. . . If the manufacturer hires a fluent English speaking employee to revise their instructions (in particular to state the purpose of the "switch" button), I think this product will definitely get 5 stars.
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