This is a sensor capacitor, variable directivity. Its originality lies in the fact that it accepts a dozen different directional characteristics, in addition with an attenuator and filter low frequencies below 100Hz.
In fact the directional range of the field to tight hypercardioid with strong rejection back through four stages and two omni-cardioid b. Simply activate together two rings located on the microphone body. I think the flexibility of interchangeable functions need not be emphasized ..

OVERALL OPINION

While it remains insensitive to noise friction remains primarily a tool studio in the broad sense of the term. It should be preferably mounted on a flexible suspension. In all scenarios the response curve remains incredibly regular, and directional changes very little as a few all frequencies, it is quite remarkable. The accuracy and chiseled taken its show it.
This is not a microphone to do everything but the voice rendering is warm, the percussion is his job without problems, even in the vicinity. On the capture of a low-cons this is amazing micro hairline and precision! Instead of brass and acoustic guitars are jobs can be improved, unless you play more than reasonably on equalization. The chiseled sensor is largely responsible ..
This sensor is hard to find. I do not know the two studios offering more. Which is a shame, because micro offers many advantages, such as a lack of phase distortion in use AB or ORTF couple .. And above a noise footprint of changing pleasantly Neumann Schoeps or other .. And me, change me change it ..