Dometic FJXADBMLWHC RV Air Distribution Box w/ Manual ControlsThis is the Air Distribution Box (ADB) for the interior of the RV. It connects to the air conditioner with four bolts, sealing the AC to the roof. The ADB also acts as a divider for the interiors intake and discharge. The ceiling controls allow for simpler wiring and the convenience of the controls be easily accessible.Modern Design: Redesigned for a modern lookLow Profile Design: (just 2-3/8″ high) leaves more headroom in the cabinSimple Wiring: 12V not required, only 120V AC power is necessaryOptimized airflow for increased efficiency and reduced noiseModern DesignThis super-flat air distribution unit blends in nicely with the interior of modern RVs. It quietly and efficiently moves the air in two direction, front and back. You can easily adjust the angle of outlet vents for individual fine-tuning. Simply use the two turning knobs to set the desired temperature and blower speed.Please No