Our propane gas detectors are used in recreational vehicles. Propane has a certain percentage in the air and will explode. your camper, the biggest danger to the safety of the camper, so our propane alarms are your best help to solve problem. The detector signal activates when dangerous levels of propane gas are detected. LOUD AND AUDIBLE ALARM SYSTEM - With a test/reset button that allows you to test and disable unwanted triggers, propane gas detection system produces an easy-to-hear alarm, so you can react quickly even in the middle of the night. A reset/squelch circuit can be activated to temporarily disable the detector while you ventilate. Color: White Material: ABS Audible Alarm Situation: 1. Voltage is lower than 8V 2. Sensor failure 3. The propane concentration is too high 4. The propane detector has a lifespan of 5 years Parameter Power Supply: 12V DC Operating Voltage: 8-16 Operating Temperature: -31°F to 150°F (-35°C to 66°C) Relative Humidity: 15% to 93% Housing