It has a nearly textbook perfect super-cardioid pattern, a five-position low frequency contour switch, a two-position high frequency switch, a critically damped internal shock suspension, and a hum bucking coil. Perfect for vocals and virtually every instrument.
There are various versions, which sound simular across the range. The microphone was first produced in 1966 and is still in production at Sennheiser. The electronics (passive preamp originally using a inductor and transformer) have changed, instead the capsule design has remained.