This Safe T Alert 85 Series Detector is a double-duty alarm that lets you upgrade single 12V propane gas alarms to a dual alarm that detects both Propane Gas and Carbon Monoxide (CO). Designed for the rugged RV environment, the Safe T Alert 85 Series is ideal for Class A Motorhomes, Class B Van Campers, Class C Mini-Motorhomes, Travel Trailers, Fifth Wheels, and Truck and Folding Campers.• New low-profile, slim design• Alarm mute button silences alarm while RV is ventilated• Rapid recovery sensor resets when silenced or reactivates alarm if dangerous levels of Propane or CO remain• Reliable 12-volt power means no missing or dead batteries to replace• Meets RVIA/NFPA requirements• Listed to UL 1484 RV and CSA 6.19 New low-profile, slim design Alarm mute button silences alarm while RV is ventilated Reliable 12-volt power means no missing or dead batteries to replace | MTI Industries Safe T Alert 85 Series Slim Line Propane and CO Detector, Black