Offering the realism of a live sound field, the AT4050ST is a side pickup condenser with cardioid elements and figure eight, configured in a center - side arrangement. This innovative stereo condenser allows the microphones to select between a left - right stereo output or separate Center - Side signals for later manipulation; providing great flexibility. The double diaphragm capsules of the microphone maintain a precise definition of the polar pattern throughout the entire frequency range. Its transformerless circuitry virtually eliminates bass distortion. Lifetime Warranty: The Lifetime Warranty covers the entire life of the product, which is estimated at 15 years, and is only available to the original purchaser of the microphone who has completed, during the 30 days following the purchase, the form of warranty registration you can find at www.audio-technica.com/warranty.