The KSM137SLSTEREO consists of two KSM137/SL cardioid condenser microphones. It now comes with the adjustable A27M adapter, designed for two mic clips. This set allows for a homogeneous pair in stereo recording using the coincident X-Y technique, or ORTF type with capsules spaced 17 cm apart and microphones forming a 110° angle. They are delivered in a carrying case with two A57F clips, two A100WS windshields, and the A27M adapter.