I had been the bicycle pump "Airboy". Depending on how far you turn up the French valve and how has set the pump, some more air came out as went in - it was very annoying. Now today my Beto arrived pump. It sets the following, fixed it and begins to pump - just as you would expect from a bicycle pump. After about half a minute my tires were inflated to 4 bar (real high-pressure so I did not try), everything was great. The device makes an overall good impression, I can only recommend it! Schön would possibly other essays in order to, for example, inflate a soccer ball can. But this negative vote would not be fair, after the delivery is clearly described.
