Update: The gauge is very inaccurate so you need a good gauge to check your tire pressure. The actual pressure was over 40psi when the gauge read only 25psi. One star away. It works very well and can also be used with a booster battery. The power cord and air hose can be stored in the small compartment at the ends. I would like to point out two things: 1. It does NOT have a carrying case. 2. It does NOT have the AUTO-OFF function described. You need to monitor tire pressure and turn it off manually afterwards. It comes with various adapters for needs other than tires. All in all a decent pump.