The SmartPlus circulator has a mode select toggle switch on the electronic control board that allows for 2 operation modes. Pulse or Smart mode can be selected using the toggle switch located on the electronic control board. Pulse mode is indicated by a flashing yellow LED light. A solid yellow LED light indicates the pump is set to Smart mode. All operation is automatic, no manual timer or temperature setting is required. When set for Pulse mode, the SmartPlus circulator will run automatically every 10 minutes to maintain hot water at all fixtures. The run time is adjustable from 1 to 10 minutes. When set for Smart mode the circulator will run in Pulse mode as above for the first 7 days. During the first 7 days, the SmartPlus will monitor and record the household's hot water usage pattern. For the next 7 days, the SmartPlus will use the preceding week's usage pattern to cycle the pump This process will be repeated every 7 days. 72 hour memory backup in case of power failure - Automatic vacation function - Exercise function - 6 foot power cord - Remote sensor