describe: Our propane gas detectors are for recreational vehicles. Propane will explode when it reaches a certain proportion in the air. This is the biggest safety hazard in your RV, camper, so our propane alarms are your best help in solving this problem. When dangerous levels of propane gas are detected, the detector signal activates. Loud, Audible Alarm System - Featuring a test/reset button that allows you to test and eliminate unwanted triggers, our gas detector propane system generates an easy-to-hear alarm so you can Quick response. When you vent, a reset/silence circuit can be activated to temporarily silence the detector. Color: White Material: ABSBuzzer Alarm situation: 1. The voltage is less than 8V 2. Sensor failure 3. Propane concentration is too high4. Propane detectors are good for 5 years Parameters Power supply: 12 VDC Working voltage: 8-16 VDC Operating temperature: -31F to 150F (-35C to 66C) Relative humidity: 15% to 93% Housing Dimensions: 4" W x 2.5" H x 0.75" D Product 10.2 x 6.5 x 2.0 cm Product weight: 73.1 g Accessory weight 8.6 g Cable length 14 cm Package Contents: 1 x Propane Detector 1 x English Manual Only the above package contents, other products are not included. Note: Light reflection and different monitors may cause color variations. Items in pictures may vary slightly from actual items. The measurement allowable error is +/-1-3cm.