Hyper Tough DC 12V Portable Analog Tire Inflator & Tire Pump, Black

I filled about 5 psi in 4 tire, was quick and easy. The pump fills air quickly but only up to 40 psi. After 40 psi is reached it struggles, trying to get a few more psi. Up to 40 psi the guage appears acurate (used my pen guage and it showed same psi). The guage doesnt go past 40 psi nor can it fill much air past 40 psi. And the power cord probably wont reach rear tires of full-size or long bed trucks unless you have power adapter in second row seat.

I saw such a pump from a friend. I bought it too and did not regret it. It pumps at the set pressure perfectly. It's long and easily reaches the rear tires. I also use it to inflate bicycle tires, air mattresses and balls with the provided adapters. There is a flashlight included for working at night as well.