Don’t think each review are each time a simple walk without any problem…. Currently at least 3 reviews are postboned until sine die:
1) Walkera Vitus 320: I got probably a defective radio and more I received a pre-release model (#id <= 375)… I will resend it to china this week
2) Bayang X21 double-GPS with 5G WiFi: as usual, channels used by this 5G WiFi are not compatible with all the android devices I own… and no possibility to change them we for the MJX B2W.
3) Blackbox D1M: DOA … no power when the battery is powered … while the system is working in media device via USB powering…