The ST2011A Stereo Pair with 2011A Cardioid Microphones from DPA is a kit that contains two 2011A Cardioid Microphones, two microphone holders, two windscreens, and a Peli foam-lined carrying case. The microphones are matched within a sensitivity of ±1.5 dB to provide accurate sonic reproduction. There is a cardioid polar pattern for obtaining several stereo miking techniques, including XY patterns and ORTF.