This is not a genuine RCD330, right? my SO is in china now, and she picked it up locally from vendor that said it would be 187B (5314 firmware, photo in comments) :
Holybro Telemetry Radio V3 433MHz 915MHz Open source SiK firmware Plug n play for 3DR Pixhawk APM Standard Flight Controller FC|Parts & Accessories| - AliExpress
CN03/13 android unit how to update the firmware and MCU - YouTube
China Manufacturer High Quality 360 Bird View Vehicle Blackbox Dvr Firmware/car Dash Cam - Buy 360 Bird View Dvr,Vehicle Blackbox Dvr Firmware,Car Dash Cam Product on Alibaba.com
1.10C Firmware F3.5 inch 50kHz 2GHz Malachite DSP Malahit SDR Radio Receiver Nice Sound with Antenna Vibrating Chambers|Voice Recognition/Control Modules| - AliExpress
KIT ST4732 from China (Firmware Update) - YouTube
Noname 2 din Win China car radio firmware update | XDA Forums
Double Din chinese car head unit with custom software...any way around it? | XDA Forums
Firmware for Chinese Aftermarket Car Stereo 4019 : r/alitronics