Our propane gas detectors are used in recreational vehicles. Propane has a certain percentage in the air and will explode. It's your RV, camper's biggest safety hazard, so our propane alarms are your best help in solving this problem. The detector signal will activate when dangerous levels of propane gas are detected. LOUD, AUDIBLE ALARM SYSTEM - Along with a test/reset button that lets you test and silence unwanted triggering our gas detector propane system produces an easy-to-hear alarm, so you can respond quickly even in the middle of night. A reset/mute circuit can be activated to temporarily mute the detector while you are venting. color:Black Material: ABS Buzzer alarm situation: 1. The voltage is less than 8V 2. Sensor failure 3. The propane concentration is too high 4. The use time of propane detector is 5 years parameter Power supply: 12 VDC Working voltage: 8-16 VDC Operating temperature: -31°F to 150°F (-35°C to 66°C) Relative Humidity: 15% to 93% Housing Dimensions: 4 inch W x 2.5 inch H x 0.75 inch D Product 10.2 x 6.5 x 2.0cm Product weight 73.1g Accessories weight 8.6g Wiring length 14cm Package Contents: 1 x Propane Detector 1 x English manual