ST100 Universal VTR controller controls them all VTRs, VCRs and DDRs. The ST100 universal controller provides low cost control over the wide range of RS422 video record / playback systems in your facility. Simple and Easy to use, there are no complicated menus to search. All the functions you need are at the press of a button. The ST 100 eliminates the need for multiple remote controllers & the associated clutter of several pieces of control hardware.