Cools water temperature by 2 - 4 °C at higher ambient temperatures: cooling fan with modern cross-flow fan and broad air flow for aquariums Easy to mount on the aquarium edge: pane thickness max. 2.4 cm. Air flow direction freely selectable and casing on mount rotatable by 360 °. Connect with power supply unit and plug power supply unit into the socket - the cooler is on Cool water through air flow at the water surface = evaporation cooling. Can be extended with JBL CoolControl temperature control. 2nd Generation: quieter thanks to improved fan wheel bearing Safety: 12 V extra-low voltage, safety cover grid. Power supply for all common mains voltages worldwide. With adjustable air jet angle Package contents: 4 W cooling fan for aquariums, power supply unit with 150 cm cable leading to the cooling fan. Cylinder fan wheel 18.5 cm wide; casing width 27 cm, casing height 6 cm