Attributes . Blue Visual Led Indicator - Blinks When Knob Settings are Changed and During Photocell Override, Configurable for Manual On/Auto Off or Auto On/Auto Off, Delayed Off Timer, Exclusive Walk-Through, Green Visual Led Indicator - Blinks During U/S Detection and is Solid During Auto-Calibration, High Inrush Stability, Industry-Exclusive "Fail-Safe" Circuitry, Industry-Exclusive Self-Configuring Local Manual Switch Input, Manual Switch and Emergency Override are Class 1 or Class 2 Circuits. Class 2 Circuits Provided for Flexibility, Output Short Circuit Protection, Solid With Emergency/Bms Input, Time Delay and Saved Settings are Protected During Power Outages and will Return to the Last Known State, Yellow Visual Led Indicator - Blinks During Test Mode . Names