This kit is similar to the ST4006A Stereo Pair, using the same MMC4006 Omnidirectional Microphone Capsule to gain its amazing sound. Whenever a small, lightweight, inconspicuous microphone for top-quality recording is required, a 4006C Omnidirectional Microphone is the right choice. They come as a hand-matched pair that offers the truest capture of stereo sound available.