Features: Made of stainless steel and high impact PC casing, ensuring durability. Waterproof, dustproof. Quick and easy to install. Very bright lights, LED light source, don't use much current and don't run hot like the old traditional bulbs. It can be used as a bows light, tail light, or running light to improve the safety of rowing. Widely used as a signal light during nighttime navigation and berthing to enhances the visibility and safety of ships. Specifications: Materials: Stainless Steel 316 Light color: green/red Size: about 61x45mm/2.4x1.77inch Power: 4W Voltage: DC12V Radiation angle: 112.5 degrees Protection level: IP68 Number of LED beads: 8 Package Includes: 1pc Navigation Light note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.