In the box: THX601 Driver module Installation hardware Instruction sheet * Features: HICOB (High Intensity Chip On Board) LED technology for unmatched light output Brightest, most efficient LED for a compact Thru-Hull 9,790 Fixture Lumens (White) 110° Light beam Colors Available : Blue or White Profile: 33mm/1.3"; Diameter: 81mm/3.25"; 122mm/4.9"shaft Mounting Hole Requirement: 25mm/1" Lens: Toughened BK7 Borosilicate Marine-grade aluminum bronze housing Input voltage: 10-31 Volts; 7.5 Amps @ 12V, 3.75 Amps @ 24V Over voltage/current, reverse polarity, and thermal rollback protection