I ordered the small compressor, because I was tired of the drama of inflating my wheelchair tires. 8 bar (maximum is 10 bar) pumping a not even the part of the best petrol station on (go to 5 bar!) I had been a small part (80, -) from the medical supply store, but does not create it. Inflating the compressor did not take time 20 seconds. The unit is relatively quiet and easy on the cigarette lighter of the car can be connected. Cons: There is no adapter for this connection to standard wall outlet for use in the apartment, but you can get. In addition, the compressed air hose is tightened on car valve of wheelchairs, the boost pressure is precisely very high. When removing escapes back a good portion of the air; I would have liked that there was a quick-release is off the going easier and faster. Having the dazugenommen from another pump, the part of the price is really unbeatable for me and pointed. Accessories ball tip and 3 additional adapters. Highly recommended!