USB powered: USB fan with USB port, no batteries required. Compatible with 5V output devices such as computers, laptops, laptops, chargers, laptop chargers, and other USB output devices. Suitable for all occasions: The evaporative air cooler (17 x 17 x 10 cm) is small and compact, perfect for offices, bedrooms, kitchen such as a small air conditioner. Adjustable air speed and spraying: the air cooler with 3 air speeds and 1 spray mode can be adjusted according to your needs, such as work, study and sleep. It is not only a fan for the hot summer, but also a humidifier to keep the air moist. Mobile Mini Air Conditioner with Water Tank: the large water tank contains more cold water and small ice cubes, turn on the power button, you get fresh air. High quality: our USB fan is made of durable ABS material for long term use. The best summer gifts for men, women, family friends in hot weather.