Widely on the net this microphone is recommended as good for its price. So I got one, and I got quite disappointed. Well it does work but quality of the audio is not great. It has noise reduction turned on all the time (no option to turn it off) and it greatly degrades audio. Not that audio quality is reduced but it also makes it choppy, if you speak bit quieter.
It could be usable in some situations like outdoors recording where external noise covers a bit usable audio so degradation is less noticeable but there is another, more limiting issue: rechargeable battery in microphone lasts less than one hour. Microphone cannot be used while charging. All in all – hardly usable.
I opened it to see how to attach larger battery and maybe if there is an option to turn of noise reduction on the board. Battery idea is possible, it just takes replacing 3.7V Li Ion battery with larger one, but I could not find any info on chip used on board to see if there is option to turn noise reduction on and off.
Here are images of open device. Last one is high resolution picture of the board.