The Sennheiser MMD 935-1 BK (article 502577) is a dynamic cardioid microphone head for Sennheiser wireless handheld transmitters, bringing the acoustic character of the wired e 935 vocal microphone to a wireless system. Sennheiser lists it for evolution wireless G3 and G4 SKM handhelds and the 2000 Series, where it screws on in place of the existing capsule. The cardioid pick-up pattern isolates the singer or speaker from other on-stage signals, and the response is uniform both on and off axis, giving a clear, present vocal sound with good feedback resistance. Frequency response is 40 - 18,000 Hz with a sensitivity of 2.5 mV/Pa. The head is black, 50.5 mm in diameter and 72.3 mm long, and weighs about 119 g. Supplied with a light-grey identification ring per the distributor listing.