TL;DR version:+ Sound comes out clear.+ Didn't take long to charge, out of the box.+ Pretty lightweight, has a clip.+ No issues with pairing the device.+ While it functions best without obstructions, it can work though walls, depending on the kind of walls you have, I imagine . . .- Can't chose between the device mic or the inline mic on your headphones.Long version: I originally bought this because the headphone extension wire was starting to malfunction ( I could only get sound out of one side), and I was using that with my gaming console. I remembered it has a bluetooth feature, but I don't like the idea of having wireless headphones. I really don't want a constant wireless signal being beamed to my head. So after a bit of exploring on Amazon, I found this. After a bit of testing, the sound seems to come though pretty well. I tried it with my laptop, my phone and my Switch. Of course there is a range limit, but it seems to transmit though walls pretty well. Keep in mind- I tested this in a two bedroom apartment, so I didn't REALLY get to push it. I should note that, the wired earbuds I used both have inline mics, but when you use it during a call, only the microphone built in the device is active. If you have your headphones on at the time, there is a audiable voice prompt that lets you know when it's "seeking" and when it's "paired". Though it was intresting. Also, the volume setting is cranked all the way up by default. Keep that in mine so you don't get startled using it for the first time. All 'n' all, it works for the reason I bought it.