Features 1. This back cooling fan adopts three speed adjustment. The tightness can be adjusted. You can adjust the gear according to the size of the headrest. 2. This car's rear seat fan can be easily manually installed without any additional tools. All you need to do is tighten the bottom rotating nut and insert it into the USB power socket. This car's powerful cooling fan has a USB power interface. It is suitable for all vehicle models, including sedans, SUVs, commercial vehicles, trucks, buses, excavators, and cranes. This electric seat backrest fan is flexible and lightweight. Whether you can place it in the car headrest or not, it won't take up too much space for you. Make your daily driving and life more comfortable and relaxed. This USB charging automatic headrest ventilation fan is equipped with a rotatable fan base. It can rotate 360 degrees. Very suitable for installation in every corner of the rear seat of a car. 5. This electric car cooling fan has 2 rotatable fan heads, providing strong wind to cool rear passengers, making it perfect for keeping them cool and comfortable. Specification Product size: Fan approximately 9.5cm, total length approximately 56cm Product material: ABS Input voltage: 12v (USB charging) Power supply method: Type-C-USB line Wind speed selection: 1-3 adjustable levels Light brightness: 1-2 adjustable levels Color: Black Size: 565 x 9.5 x 1 cm Weight: 390 g Package Include: 1x Car Backseat USB Car Fan