Features: Efficient Ventilation: This car exhaust fan provides powerful and efficient ventilation helping to eliminate the peculiar smell inside your car and keep the air fresh and clean. Dual-Use Design: This car exhaust fan can be used both in the car and at home making it a versatile and convenient choice for those who want to improve air quality in multiple settings. Solar-Powered Or USB Interface: This car exhaust fan can be powered either by solar energy or by usb interface giving you flexibility and convenience in how you choose to use it. Cooler And Radiator Function: This car exhaust fan not only ventilates the air but also helps to cool your car's interior by functioning as a radiator. Easy To Install: This car exhaust fan is easy to install and comes with all the necessary hardware and instructions. Specifications: Material: ABS Input/Output Voltage: Dc/5V Fan Speed: About 3500R Solar Panel Power: 3W Battery Capacity: 4000Mah Charging Time: About 5 Hours Continuous Working Time: About 6 Hours Strip Lumens: 390~ 395Lm includes: 1 *Car Amplifier Cooling Fans 1 * USB Cable "