This is a set of cardio electrostatic pressure gradient.

OVERALL OPINION

Set a really powerful and for the price (especially during argus) was worth it.
Perfect atmosphere, even if AIM I can see that it gives a battery ...
on the other hand XY, intrt little more efficient in ORTF.
The quality of sound recording is exemplary, good signal to noise ratio, but the use of the cups is required in many cases because of their high sensitivity which is a shame because it matifies lgrement their sound.
In any case without the windshield is really a rgal.
Compared to a couple Schoeps three times more expensive, has good grip, good curve rponse (very right) ...
Take a couple directly.