When connecting the car to Bluetooth, it should only be heard on the speaker of the sound-level car, but it can't be heard in the rear view mirror. It also says that it can be heard through the vehicle's speakers using FM 100.4 frequency, which is also not possible. I talked a lot with the seller about this problem, and he said he would solve this part through firmware update. I hope the update resolves itself as soon as possible. Other functions work very well.
crashes, has many issues, no updates