Combines water evaporation with a fan: works as an air conditioner as well as a humidifier.
Easy to use: put the soaked sponge into the cooler body, insert batteries or connect the USB port, and it begins to work.
Working modes: cooling & fan mode and fan mode (take the sponge away when you don't need the cooling function).
Power supply choices: 4 x AA batteries, USB port, and power adapter. (batteries and adapters Not included but You get a free power bank)