Atwood 31014 RV Propane Gas Detector - 12V DC， Black<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Alerts you to potentially dangerous levels of gas in your RV</li><li>Fuel-cell sensor is less sensitive to false alarm triggers than other detectors</li><li>Test/Mute button lets you test and silence alarm</li><li>Four indicator lights: Green blinking (normal operation)， Red flashing (active alarm)， Red blinking (low power)， Yellow blink (maintenance required)</li><li>ETL tested and CSA certified</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51Pjq0rAsFL.jpg" noproxy>