[ Environment] It can help to eliminate the peculiar smell produced by the leather cushions of new car, smell of sweat on the steering wheel and buttons, smell of second-hand smoke and the gases emitted by cars. It can keep air fresh inside and provide you and your family with a healthy and comfortable environment. [Easy to Install] First, hang the exhaust fan vent on the auto door glass. Second, make solar penal toward the sun. And then install it with long adhesive strips and short adhesive strips according to the instruction book, avoid leaving gaps in the window. It can be used continuously on . It is easy to install and is of great practicability. [Seven Advantages] The high-efficiency three-vortex exhaust fan rotates at 3500 revolutions per minute. Solar panels are guaranteed for ten years. It does not need the power supply inside the car, only need the solar power or batteries. Personalized decorations can enhance the grade of cars inside and it can the aging of interior parts. [Please Note] It's not a fan for car users, just an Auto Cooler Ventilation Fan to circulate the air in your car. It does nott lower the temperature like air conditioning. It can fit for any car , but if your car window has current sensing function, the please buy with caution. Specification: Type: Solar powered vehicle exhaust fan Fan number:3 Voltage: 2.4 V Rotate speed: 3500 rpm Continuous working time: 10 hours Solar panel power: 4 W Current: 1600 mAh Built-in batteries capacity: 2AA*1200mAh(included) Solar position:outside window Colour:black Material:ABS Size:22 x 11 x 6.5cm Package Contents: 1 * Car Fan Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.