There is an on/off switch and volume control located on the front of the unit and LED light meter reveals flow output in liters per minute. There is an easily accessible diagnosis mode switch located on the underside of the front panel.
There is minimal maintenance required with this unit. The internal filters require changing approximately every 2000 hours. In the front of the unit there is an easily accessible coarse filter that should be removed and cleaned with warm water approximately twice a month. This coarse filter does not require changing.