BN-LINK outdoor outlet timer will continue to function in extreme weather conditions. Perfect for your outdoor lights, pool pumps, fountains, and Christmas/ yard/patio/landscape/holiday lamps and other electric devices. Easy setting: Turn the timer dial to the current time. Push all the pins down for the run time, and pull other pins up for the off-time. Set the manual override switch on Timer, then it will automatically turn on/off your appliance to save energy. Note: Compressors may affect the rating of your appliance when being used with our products. Please ensure the BTU/hr on your appliance is compatible with our product. Please refer to the application guide in the technical details.