The Air cooler will create 45% cooler air over 7 metres. Under normal conditions, 1.5 litres of water will last up to 30 hours on \'low\' speed. The unit has 4 speed settings from low through to BOOST for an extra cooling blast in the hottest climates. The low setting is designed to run as quietly as possible to allow you to sleep on humid nights while experiencing a cooling gentle breeze.Evaporative air cooler 45% cooler than the ambient air temperatureCan work with 12V, 24V & 100 - 240V MainsLow current draw - only 0.3 - 1.8 ampsLow Battery Voltage Cut-out - reduces the risk of flat batteries4 speed settingsDirectional air ventsTransparent water level window4m power leadSize L260 x H210 x W240mmWeight: 2.0kg