Signal Mate's 360 White LED Distress Strobe Light is used for power, sailboats and commercial vessels up to and over 164' (50m). Small but robust, the 2NM 360 Distress Strobe Light includes a bracket and latest technology high-brightness (HB) lens. Constant brightness over the full operating range of 10V to 30V DC ensures the light will meet or exceed nautical mile requirements if the battery voltage drops. Active & passive RF filtering to prevent radio interference. Reverse polarity-protected, surge-protected, waterproof and vibration-proof.Specifications:Visibility: 2 NMFPM: 60Application: Sailboats up to/over 164'Voltage Range: 10V to 30V DCWattage: 2WDimensions: 3 1/4"W x 1 1/2"DCertifications: USCG 2NM, COLREGS '72, ABYC A-16Warranty: 5 years