Features: 19.68Inch USB 5V 6W Ceiling Fan with Switching, efficient. 3blades quiet ceiling fan for dorms, bedrooms, picnics, trucks, etc. USB cable length about 230cm,speed 330rpm,power 6W. Input USB5V1.5A-2A. Suitable for indoor and outdoor use, power by USB adapters, mobile power, computer, etc. Keep cooling and comfortable with the usb ceiling fan, perfect for camping, tenting, and outdoor use. Specifications: USB Cable Length About ：230cm/90.55in Speed 330rpm Power 6W Diameter about: 50cm/19.68in BladeAbout：20.50cm/8.07in Package Includes: 1Set USB Ceiling Fan note: Due to problem of lighting and there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurment