Marine Technologies 35-742-WH MTI Industries 35-741-WT Detector Lp & Co Flush Mount Alarm White Replaces all Safe-T-Alert Model 30-442 series propane alarms and most CCI Controls flush mount propane alarms without modifications Flush mount fits most manufacturers cut outs for LP Gas leak detectors including Fleetwood & Winnnebago's Meets 2015requirements set by RVIA for CO alarms and Propane Detectors Double-duty alarm detects LP Gas and Carbon Monoxide simultaneously Built for the extreme RV environment Listed to UL 12 Volt power means no missing or dead batteries to replace Meets 5/1/2011 requirements set by RVIA for CO alarms and Propane Detectors. Case Size: 6.375"W x 2.875"H x 1.25"D