The 20-441-P-BL Mini LP gas alarm saves interior space. Smallest LP gas alarm that is available in the market today. Great replacement for large surface mounted LP gas detectors. Built for the extreme RV environment. One-touch test/reset button. Alarm can be muted during ventilation, but will re-alarm if hazardous conditions recur. 12V wire-in. Surface Mount: 3-1/2"W x 2-1/2"H x 1-1/4"D. UL listed.