PSA1 Studio Microphone Boom Arm 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 its height is adjusted and internal springs are moved for quiet operation. 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 shock mount/clip weight between 700g to 1.1kg No matter what kind of content creator you are, you need a mic boom arm.