Features: USB5V power high wind power hanging waist fan, 9733 fan with adjustable speed with switching USB 4800RPM fast speed large wind power multi-function fan, outdoor construction site takeout cooling blowing blower cooling fan, mainly used for outdoor activity, construction workers, barbecue. Double belled bearings, speed: 4800RPM, airflow: 40CFM, wind noise: 58dB；The total length of the power cord is 270cm USB input 5V2A-3A, also support 12V 5.5x2.1mm input but not support speed controls, with metal clip, can be clipped on the belt use With double metal protections net, especially suitable for construction workers. It can be used for power supply with mobile power, USB adapter, etc. It can also be used for fire, sports cooling, hair drying and so on. Specifications: Bearing: Double Balled Bearings Speed: 4800RPM Airflow: 40CFM Wind noise: 58dB Total length of power cord 270cm/106.3in USB input 5V2A-3A, also support 12V 5.5x2.1mm input but does not support speed controls Fan Size:about 15x9.5x5cm/5.9x3.7x1.97in Component:Plastic Duct Diameter about：3.3cm/1.3in Package Includes: 1Set USB Fan note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color the item.