The PSC SC-4 is a professional portable sound cart designed to support audio and video equipment. The cart is constructed with a durable aircraft aluminum and features a sturdy 17 x 18" standard shelf and the top shelf is measured at 11 x 18". The cart is completely customizable with such options as carpeted shelves and shelf molding, rack rails and drawers, boom pole holders, hooks for cable and headphone storage and an umbrella shield.