I wanted to love this pump and kept it in every car for emergencies. Unfortunately, my first experience with the pump was not very successful. I tried to put some air in a car tire. The first problem, the valve stem on the tire was pointing up and I didn't want to move the car to fill a tyre. The hose is too short for the unit to stand on the ground and reach the handle, so I had to hold onto it. The pump worked, but very slowly. The tire took a few seconds to inflate one psi. It would also leak near the stem if I didn't hope the device was at the correct height and angle. I was frustrated with the pump because I had to add 10psi to the tire and the pump leaked another 10psi when plugged in and installed and held it for over a minute trying to keep it from moving. flow more. The pump might work in a pinch, but I'm not sure I'll believe it will work when I need it on the side of the road.