The Safe T Alert 30 Series Propane/LP Gas Alarm is designed for the rugged RV environment and is ideal for Class A motor homes, Class B van campers, Class C mini-motor homes, travel trailers, 5th wheels, trucks, and folding campers. It features advanced technology with an "Alarm Mute" button that silences the alarm when the RV is ventilated and rapid recovery sensor that resets when silenced or reactivates if dangerous levels of propane remain. Easy 12-volt installation means there will be no missing or dead batteries to replace. Meets RVIA/NFPA requirements. Listed to UL 1484 RV.• Meets RVIA/NFPA requirements• Alarm Mute button silences alarm during ventilation• Fully operational during mute cycle• Flush mount• 12-volt• UL listed• Size: 6-3/8"W x 2-7/8"H x 1"D Rapid recovery sensor resets when silenced Flush mounts with easy 12V installation Meets RVIA/NFPA requirements & listed to UL 1484 RV | MTI Industries Safe T Alert 30 Series RV Propane Gas Alarm, Black