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The Viking AR06BTCV3902 is a discreet temperature controller and regulator that is used to regulate temperature in commercial water heaters and other similar applications. It features a built-in digital temperature set point, adjustable differential, and adjustable temperature hysteresis (deadband). The control also offers an override switch, manual reset, and a remote temperature sensor jack. Additionally, the AR06BTCV3902 has an adjustable high temperature limit, quick-connect terminals, LED indicators, and an external LED indicator capability.