This is a 12V car-use mini air pump that can inflate your car tires when the air pressure is low, to prevent damage to the tires. It typically takes 10 to 15 minutes to fully inflate the tires to 250PSI. It also comes with a variety of needle tips, making it suitable for inflatable objects such as motorcycles and footballs. It is both economical and practical, making it a great choice for protecting your tires.