This is our latest addition to the Sound Professionals line of mini stereo microphones, perfect for "Stealth" recording situations when you need tiny mics that will do an excellent job of reducing unwanted crowd noise and create faithful audio recording of the event. They are our best combination of small size and high quality sound reproduction! The sub-miniature stereo microphone system includes matched set of tiny cardioid microphones they significantly reduce sound coming from the sides and rear. The precision microphone capsules feature micron thick, 6mm diameter nickel-plated diaphragms. The flexible, high quality lightweight shielded microphone cable enters the mic body from the bottom. Two removable clips are included. The two microphone cables are terminated together into high quality stereo gold plated 1/8" (3.5mm) mini plug ready to connect to your portable recorder's microphone input. These mics are great choice for unobtrusive recordings and are the most directional, smallest, best-sounding cardioid microphones available. These microphones can be powered with normal "plug-in-power", available on many portable recorders and camcorders. For use in high SPL (sound pressure level) situations, the microphones require additional power, beyond the normal "plug in power", using microphone power supply.