The microphone has good sound, 2 electret capsules in a plastic molding. Effect rsonnance mdium Windscreen and even homemade (capsules absolutely not being protected).
Dception when the "prampli". It is in fact a diet with 1.5 volume control on output. Any power supply for electret would then do.

OVERALL OPINION

This is not a micro pramplifi good sensitivity of the microphone allows you to exit some of its non pramplification, but the big blow comes when everything normalizes .
But for the price, hard to beat.
Vivanco possibly ...