To ensure safe operation of a copter indoors is a protective ring m. E. essential. Stupid is just, that the company Hubsan organized a kind of lottery. This guard ring is advertised as suitable for Hubsan H107 X4. This may be true, but it does not. From Hubsan H107 X4 there is more than one model (with or without camera), having different diameters of the motors. Since there is no clear Artkelnummer, an unambiguous assignment is not possible.
I had to send back my guard ring.
Tip: definitely order from a dealer with shipping from Germany. We know where you stand and then faster the rescission is better regulated.
