JBL ProTemp Cooler x300 is a modern cross-flow fan with broad airflow -indispensable in high summer. The JBL coolers for freshwater and marine aquariums cool down by 2-4 °C with the help of cross-flow fans. Due to the air flow the warm water evaporates at the water surface and thus generates evaporative cooling. This is comparable to evaporation cooling of a wet body part which is exposed to the wind. The bracket of the cooling fan is placed onto the aquarium rim (up to max. 2.4 cm thickness) and fixed with clamp screws.For fresh & marine water aquariums from 90 – 300 Litres.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°.Cool water through air flow at the water surface = evaporation cooling. Expandable with JBL CoolControl temperature controlSafety: 12 V extra-low voltage, safety cover grid. Power supply for all common mains voltages worldwide. With adjustable air jet anglePackage 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