The Sennheiser MMD 945-1 Dynamic Microphone Capsule is for use with the Evolution Wireless transmitters by Sennheiser. The microphone head features the acoustic properties of the e945 handheld transmitter widely known for consistently delivering full sounds whilst rejecting high feedback levels and other instruments on the stage. The MMD 945-1 also boasts uniform response both on-axis and off-axis so you can be sure to achieve consistency without sacrificing the energy of the performance.