Safe-T-Alert 62 Series Carbon Monoxide Alarm - 12V - 62-541-Marine - Surface Mount - Black [62-541-MARINE-BL]62 Series Carbon Monoxide Alarm 12V 62 541 Marine Surface Mount Black Mini Carbon Monoxide Alarm with a compact space saving design that replaces your CO alarms that are over 5 years old! Features: Space Saving Surface Mount Compact design for boats Designed for the harsh marine environment No False Alarms due to new boat smell, outgassing or non hazardous levels of hydrocarbon gases encountered while boating Advanced Technology Alarm Mute button