Feature●DUAL PROPANE & CO DETECTION – Patented Double-Duty Alarm upgrades single 12V propane alarms to detect both Propane Gas and Carbon Monoxide. Space-saving design ideal for RVs.●TRIM RING FOR EASY RETROFIT – Includes a trim ring to cover existing screw holes and fit newer alarms into older installation cutouts—no extra modifications needed.●COMPACT & RUGGED DESIGN – Mini flush mount size perfect for Class A, B, C Motorhomes, Travel Trailers, Fifth Wheels, and Campers. Built to handle tough RV environments.●12V RELIABILITY, BATTERY-FREE – Runs on 12v DC power for dependable, long-term safety with no battery replacements. Includes low voltage warning and efficient circuitry.●CERTIFIED PROTECTION – Meets RVIA/NFPA standards and conforms to UL STD 2034 RV / 1484 RV. Operates in temperatures from -40°F to +158°F.Descriptionclass="celwidget pd_rd_w-xPwOx pd_rd_r-XWZG43PHKPYDV1V1C63W pd_rd_wg-e4jmZ" data-feature-name="aplus" data-csa-c-type="widget" data-csa-c-content-id="aplus" data-csa-c-slot-id="aplus_feature_div" data-csa-c-asin="" data-csa-c-is-in-initial-active-row="false" data-csa-c-id="fton9z-72v74f-myax87-yc45n3" data-cel-widget="aplus_feature_div">