O-Best Batteries/USB Powered Portable Mini Air Conditioning Fan Chargeable Hand-held No Leaf Fan Air Conditioner Cooling Fan (Green) Fashion Rechargeable mini Fan, built-in Lithium battery,comes with USB cable. With unique double cooling modes of fan and air-conditioning, temperature will decrease by 3-5 degrees. Wet the water-cooled sponge, put it in the sponge slot. The fan will give you wet breeze. No awkward grills or blades. Portable & Mini design, convenient & easy operate in anywhere.