'Powerful' car fan 'pushes cool air across entire backseat' is a 'lifesaver for summer travel'"The double fan design gives good airflow to the back seat, which is very useful for children, pets or passengers." The USB-powered car fan works with power banks and car chargers, making it easy to install. The double fan design gives good airflow to the back seat, which is very useful for children, pets or passengers," said a shopper. Backseat car fan £21.99 £15.99 Amazon Buy Here Product Description The Yerloa USB fan helps circulate air across backseats, a handy gadget for older cars that don't have air conditioning in the back. What makes this unit so incredibly effective is the clever Dual Head Car Fan design, which pushes a massive amount of circulated air right across the entire backseat area.