The PSA1 is a professional studio boom arm that allows easy and precise placement of a microphone. It features an innovative parallelogram design that keeps the mic direction constant as the height is adjusted, as well as internal springs for quiet operation. Key Features: Professional studio arm Ideal for radio, broadcast, studio, and home use Internal springs for quiet operation Includes both threaded desk insert and desk mount clamp Supported microphone and shockmount/clip weight between 700g to 1.1kg