The MTI Industries Mini Dual LP/CO Alarm is the perfect choice for any RV. This surface mount alarm is designed to detect both carbon monoxide and propane gas, and comes in a sleek black finish. Dual protection from both carbon monoxide and propane gas Easy to install Alarm Mute button silences alarm while RV is ventilated 12 Volt power means no missing or dead batteries to replace Test/reset button Meets RVIA/NFPA requirements - listed to UL 1484 RV and UL 2034 RV Upgrades single 12 Volt Propane Gas alarms to a dual alarm that detects both Propane Gas and CO