The Sennheiser MMK 965-1 BK is a flagship large-diaphragm true condenser microphone head for Sennheiser wireless handheld transmitters, in black. Its dual-membrane capsule lets the pickup pattern be switched between cardioid and supercardioid, so one capsule can be set wider for singers who move around or tighter for loud stages with lots of monitor spill. The sound is powerful and highly detailed, making it a popular choice for lead vocals and demanding live productions. It screws onto compatible handheld transmitters in seconds without tools; Sennheiser lists compatibility with the evolution wireless G3, 2000 and Digital 9000 series handhelds. Frequency response is 40 Hz to 20 kHz and sensitivity 1.8 or 5.7 mV/Pa depending on pattern. The capsule weighs 162 g, is 77.3 mm long and 49 mm in diameter. Only the capsule is supplied - no transmitter, receiver or cable - so it is an upgrade or replacement head for an existing system.