Our propane gas detectors are designed for use in recreational vehicles. Propane can pose a safety hazard when present in certain concentrations in the air, and detection is important for safety. These alarms help detect dangerous levels of propane gas and feature a loud, audible alarm system to alert users. The unit includes a test/reset button to test the device or silence nuisance alarms. A reset/mute function allows temporary silencing while ventilating the area.Color: White Material: ABS Buzzer alarm triggers under the following conditions: - Voltage drops below 8V - Sensor failure - High propane concentration - End of service life (5 years)Specifications: Power supply: 12 VDC Working voltage: 816 VDC Operating temperature: -31F to 150F (-35C to 66C) Relative humidity: 15% to 93% Housing dimensions: 4 inch W x 2.5 inch H x 0.75 inch D (10.2 x 6.5 x 2.0 cm) Product weight: 73.1g Accessories weight: 8.6g Wiring length: 14 cm Package Contents: 1 x Propane Detector 1 x English Manual Note: The package includes only the items listed above. Light reflection and display differences may cause slight color variations between the product image and actual item. Measurement may vary by +/- 13 cm.