The Shure KSM313 is a premium bidirectional ribbon microphone for world-class audio and performance. The Dual-Voice design features discrete front-and-rear side sonic signatures for use with amplified instruments or in intimate vocal applications. Hand-assembled in the USA with custom components and proprietary Roswellite technology for revolutionary ribbon resilience under extreme conditions. The high-tensile strength, toughness and shape memory of Roswellite ribbon material replaces traditional foil ribbons for superior resilience at extreme sound pressure levels. Shure KSM ribbon mics are the necessary choice for the world's most accomplished studio and live performances.