WORKS WITH STANDARD OUTLETS: Connects to any standard 15-amp electrical outlet and automatically turns on according to ambient air temperature | 2 PORTS: Dual receptacles allow for use with multiple electrical devices; Material: Plastic; Color: White; Dimensions (L x W x H): 4 x 2 x 2 inches; Weight: 0.25 pounds; Manufacturer's warranty: 1-year warranty | AUTOMATIC: Turns on as temperature falls to approximately 20 degrees Fahrenheit and switches off again as temperature rises above 30 degrees | KEEP YOUR ENGINES READY: Ideal for automotive applications, including engine and battery heaters | LOWER HEAT COST: Uses less energy than constant heaters, greatly reducing heating costs