Fireboy-Xintex CMD6 12/24V Carbon Monoxide Detector - BlackThe CDM6 12V Carbon Monoxide detector features an electrochemical sensor and a backup battery in case of a power outage. This top of the line sensor allows for immediate alarms and stablensing to reduce false alarms. The compact design allows for inconspicuous protection. An internal relay allows for generator shutdown or external signal. . Interconnect multiple units for full vessel protection. The backup battery has an approximate life of 7 yearsFeatures: Compact design; Internal backup battery; Internal relay; Interconnect multiple alarms; Microprocessor controlled; Specifications: End of life: Approx. 7 years; Alarm Point: 10% COHb; Power usage @ 12vDC : 4mA; Alarm Horn 85 dBA; Dimensions: 3.5" x 3.5" x 1.21"; Warranty: 1 Year limited; Click here for Fireboy-Xintex CMD6 Owners Manual