I work with a big choir (80 girls) doing video and simple sound recordings from concerts. We have 4 Audio Technica P170 which work great for our needs. I decided I wanted to experiment with microphone setups, so I got a pair of these to play around, since they are inexpensive. The first pair was actually OK, sounded better than I expected and the build quality seemed great for the price. So I decided to order 3 more pairs, to play around some more. Long story short: half of the microphones I got had some sort of issue: faulty connection, big difference in sound output, bad quality sound, etc. I returned the first faulty pair,got a replacement which had issues too.
Would not recommend.