SUGIFT Evaporative Air Cooler takes advantage of bladeless fan, has 3 COOLING MODES Normal/Natural/Sleeping modes switch speeds to simulate wind changing, feel the soft breeze surround you; high/middle/low 3 wind speeds create a most comfortable zone for your working and sleeping. Bladeless fan cools in low/medium speeds less than 45dB low noise in sleeping mode, won't disturb your rest at summer night. Evaporative air cooler only 80W power supply spends less energy, humidification function helps to save you from dryness of AC as well. No need of compressor as A/Cs, Swamp Cooler is a cost-effective way to cool indoor, which is also low maintenance cooling option for home and office.