This is the best $10 cordless bicycle tire pump. It’s about the size of a police scanner. Very simple to use. Switch the mode to bicycle and set the amount of air. The air tube screws on which is great. The locking air chucks are a pain to hook up if the air pressure gets too low. Click power and you are done in about a minute. It is a little loud and I recharge it after each use. For a bicycle it's perfect, but I don’t think I would use it for a car tire.