A 1:The wall-mounted air cooler needs to be connected to a tap water pipe, which can control the water level by itself. All this is automatic.
2:The mobile air cooler has a large-capacity water tank at the bottom. When it is filled with water, you can use it wherever there is a power supply (even if there is no water pipe). When it is fixed in the same position, you can use a water pipe to connect It, hydration is fully automatic.