The use case for my purchase is recording of my voice whilst I give presentations. The microphone will be connected directly to a personal computer or Zoom field recorder. (properly adapted with the relevant plugs and cable).
The ear hooks are covered with some silicone tubing and the ends have silicone tips (to cover the sharp points of the iron wire inside). These tips fall of very easily, leaving the pointy wire naked to hurt the ears. In my case one fell off at the second fitting attempt. I tried to glue these nibs with cyano-acrylate (i.e. super glue, and it is still drying as I write this review).
Regarding the sound quality. The audio samples on the product page are not representative. This microphone is lacking a lot of bass and presence and I have to equalize the sh.. out of it. Treble and sibilants, however, are plenty (too much sibilants, more EQ-ing required there too).
Volume level is very low too, but boosting the gain seems to be harmless to self noise, so that is not really an issue. Even a Zoom H4n Pro 3.5mm jack input can amplify enough to good levels (for reference).
While I was researching the product for my use case (connect to PC or Zoom recorder), I found that it is lacking some important technical specs online. I was happy to finally find the information I looked for on the box, more particularly the allowed operating voltage range which turns out to be 1~10 V DC.
Pro's: lightweight, cheap.
Con's: thin sound (could be fitting for your purpose though, e.g. you want to remove lots of bass for live scenes), fragile built (silicone protection tips fall off).
