Simple one-channel propane fume detector, Includes ""Test"" and ""Mute"" buttons, Alarms at 18-20% LEL, Includes one MS-2 sensor, Solenoid valve control not available, 12 VDC operation, Display size is 2"" in diameter, Product : XINTEX 2"" PROPANE DETECTOR W/PLUG IN SENSOR NO SOLENOID Manufacturer : XINTEX / FIREBOY Manufacturer Part No : S-1 UPC : 619749211709 SKU: CW28159