Small and useful with small weaknesses

Positives:
+ Small handy, easy to use
+ Choice between cash or PSI
+ Digital display of knife teeth to 30 seconds after measurement
+ Automatic shutdown
+ Battery already included and used ... but see below

Negatives:
- Measurement result by about 0.2 bar lower than the actual tire pressure (compared with 3 stations)
- "Klackergeräusch" in motion (probably because of the ball the befinet inside)
- The battery can not be so easily replaced well, since there is no trade for it. The device must be well screwed it (which I have now yet
not try, because it still works)
- From a "acoustic signal" as described unfortunately I could perceive nothing but also not disturbing me.