The 16-071-704 is a 1X4 unbalanced audio distribution amplifier packaged in a small epoxy block without connectors. This VAC Mini Function Block product is intended to be designed into a users product and hard wired into the system.<br>The product provides 6-32 threaded mounting holes so the user can mount the Mini Function Block. The dimensions of the Mini Function Block are designed so the product can be mounted to a PC card and slide into standard PC card racks.