Smart Move Gobo Rotator holds one or two "B" round gobos, secured by a heavy duty reversible retaining ring. Made of machined aluminum, the retaining ring is secured in place by two spring clips for easy adjustment and replacement. Belt driven for quiet operation while being powered by a rugged 24V power supply standard with the unit. The rotator's black, powder-coat 18 gauge steel provides rigidity and durability. Infinitely variable speed range from 0 to 21 rpm plus rotary switches for easy setting to desired effect.