40 4 inch round usb fan products are offered for sale by suppliers on Alibaba.com, of which table fans accounts for 20%, portable & wearable fans accounts for 17%, and smart fans accounts for 2%.
A wide variety of 4 inch round usb fan options are available to you, such as household, outdoor and hotel.You can also choose from table, handheld and box 4 inch round usb fan,as well as from 1, 5, and 3 4 inch round usb fan, and whether 4 inch round usb fan is cooling, air cooling, or cooling air.