1,SAFETY FIRST: Invisible propane gas leaking into your sleeping space can cause dizziness, headache, and worse. Our propane leak detector for your RV lets you know the moment there is a problem, so you can fix it immediately. 2, SENSITIVE and ADVANCED SENSOR: Funomo RV propane detector is designed with a Japanese Figaro sensor and certified by Listing Standard ANSI/UL1484, to provide more reliable protection for you and your family. 3, REAL-TIME DIGITAL DISPLAY: This RV propane alarm features a digital screen that shows real-time propane value (%LEL) clearly, so you'll know when it's time to react and fix a problem. 4, 85dB AUDIBLE ALARM: When propane value is over 5% LEL (defaulted), our propane gas detector produces a loud enough alarm to guarantee you can respond quickly, even when sleeping or outdoors. There is also a TEST/MUTE button that lets you test and silence unwanted triggering. 5, Easy to Install and Use: Shelled in double-sided ABS and anti-corrosive. Wipes clean easily. 12V quick installation, no need to replace dead or missing batteries. Use in the kitchen or your camper. Ideal for travel trailer, camper and other motorhomes. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.