AKG CK 61-ULS, High quality cardioid capsule with exceptionally flat on-axis frequency response, High temperature stability, reliable construction, Gold plated, self-cleaning connector pins for high resistance to humidity. The ruler-flat frequency response and consistent polar pattern of the CK 61-ULS make it ideal for critical recording and live sound applications where consistent suppression of off-axis sound is an important requirement.. Includes foam windscreen.. For use with the preamplifier C 480 B-ULS