Complete drive unit contained in light head. Single lever or touch pad control for vertical & horizontal light movement. Two-speed light movement. Auto-sweep mode cycles light 90 deg side -to-side automatically. Designed for saltwater with chrome brass housing & base. Control is water-resistant with plug in connections. Two types of light output. MODEL 5342917: Spot/Flood sealed beam bulb, 200,000/50,000 candlepower.