ATS series line/generator switches are' designed to automatically switch the on board 120 Volt appliances to generator power when the generator is activated. No longer do you need to go outside, remove the shoreline cord from the pole and plug it into the generator receptacle. Nor will you have to go to the breaker panel, manually shut off the shoreline mains, and then turn on the generator mains. Simply starting the generator activates the ATS, which will switch the loads for you.