The Soyuz SU-013 is a solid state pencil microphone, with the same capsule design as the SU-011. The only difference is the SU-013 uses a custom designed FET pre-amp instead of a tube. The Soyuz SU-013 is available in either a classic black, or cream and brass finish. They are also sold as a matched pair for stereo recording. The SU-013 comes as a cardioid microphone, but there are interchangeable hypercardioid and omnidirectional capsules available too.