I was really surprised by the build and quality of the microphones, They are not what I had expected for such a budget price. I would have expected to pay a lot more if I had been looking at this build quality in a store.
Sound pick up is very directional with reasonable isolation. They have a good frequency response range, with an excellent voice reproduction.
Use either as a matched stereo pair or as a singleton and spare. I will defiantly be investing in another pair soon.