Ok function Haltbakeit bad

The fact that you can set it up (show), you may also refer just to go somewhere and make bubbles / can circulate, unlike other hand fans who do not have secure footing.
It is a bit noisy but this owed to the system "less DC motor".
With 2 AA Eneloop batteries of fans also runs reasonably long.

The battery compartment is unfortunately very hakelig.
After a year now, unfortunately, the housing cover has given up the ghost without external load in manual mode.
Safe operation is no longer possible.

Conclusion:
4 points for the function and operation, 1 point deduction for the battery compartment 2 points deduction for durability