Innovative products from The Great American Market. A family of reliable control and test tools indispensable to every lighting designer and electrician.Repeats DMX signal so that an additional 32 connections can be added. Battery operated or optional AC adapter. Optically isolates control signal from power surges & shorts. Splits output signal, looping one side directly ‚¬â€other side optically isolated, line driven. Isolates auxiliary equipment to prevent feedback. Size: 3-1/2 x 5-1/2 x 1-5/8", Weight 13.5 oz.