Low Price Interdynamics TX-300 TyphoonMax 12-Volt High Speed Air Compressor

I got tired of waiting in line at the gas station for the air hose, especially during the bitter cold months of winter, so I decided to get a compressor to use in my own garage. This compressor fit the bill for me. It has a pretty durable build overall, and the power cord is long enough to comfortably reach both front and rear tires on either side of the car when you run it out the driver and passenger side doors, respectively. It's probably long enough to run around the front and back of smaller cars to reach all four tires from just one door, but I consider it more of a hassle than slipping it through the passenger compartment. I have not had any issues winding the power cable back into the unit's storage compartment, but I also leave the air hose hanging out to make room -- there are cutouts in the case that let you thread the hose (and power cable) out while still being able to close the compartment cover.

The screw-on air hose connect fastens to the tire very securely but, as others have mentioned, you'll lose some air when you attach or remove it. How much air you lose depends on your technique. If you're reasonably consistent, you can make up the difference (usually around 2-4 psi) by inflating your tire to slightly above your target pressure before removing it. That's certainly close enough for automobile tires.

I should also mention that the built-in pressure gauge is not terribly accurate, maybe +/- 2 to 3 psi. However, the readings are consistent at a given pressure, so you can just calibrate it once to figure the difference between the unit's reading and a more accurate gauge's reading, and you'll be good to go thereafter.

If this REALLY bugs you, then I'd recommend another compressor or you can get the "EZ - Air Tire Gauge" which acts as an "in line" pressure gauge that the TyphoonMax can attach to on one end for inflation, and on the other end has a quick attach/detatch connector like a more traditional tire guage/pump. This lets you effectively attach/detatch the compressor very, very quickly, while providing a more accurate reading of the tire pressure without having to swap between the compressor and another gauge.
Get more detail about Interdynamics TX-300 TyphoonMax 12-Volt High Speed Air Compressor.