MTI Industries 30-442-P-BR Safe T Alert 30 Series Propane/LP Gas Alarm - Flush Mount, Brown Power Supply and Current Draw: 12 vDC 90mA @ 12 vDC Alarm Point: &lt; 25% LEL of Propane Operational Range: 12vDC +/- 15% Operating Temperature: -40 F to +158 F Loud 85 dB Alarm Dimensions: 6 3/8 W x 2 7/8 H x 1 D