The Safe T Alert Propane/Natural Gas Alarm features a loud 85dB alarm to alert you of potentially dangerous gas leaks. It also has a self cleaning, built-in senor. This alarm is ideal for residential homes, commercial businesses, or industrial buildings. It is UL listed to UL 1484 and ULC, CGA approved. Features: InteleCheck Circuit: Eliminates false alarms caused from momentary exposure to Propane Gas, Natural Gas, aerosol cleaners, hair spray and other flammable gases. Long Life, Self Cleaning Sensor: Maintenance free built-in sensor. Micro Current Technology: 2 watt current draw. Costs pennies to operate. Loud 85dB Alarm: Alerts you to the presence of a potentially dangerous gas leak. Test/Reset Button: Used to temporarily silence alarm during ventilation. Tests all detector functions with one touch. No Dangerous Gas Required. 5 Year Limited Warranty. Easy Plug-In Installation. Power 12 vDC: Transformer with 6 foot line cord.