humidifier where to place, Gas tank 4 In 1 multifunctional air purifier

product link: Gas tank 4 In 1 multifunctional air humidifier, The humidifier is equipped with USB interface, which can connect to USB fan and USB light, and has a specially designed oil adding port, which can purify air in the humidifying colleagues. Small size, usb-powered, can be used in cars, offices, bedrooms, convenient to carry, fashionable shape