Updating without the correct file can permanently "brick" the unit.
is a popular, generic 7-inch "double din" MP5 car radio produced by various Chinese manufacturers like Shenzhen Reako Electronic 7010b radio firmware update 2021
Additionally, the 2021 update added a (press Menu + 0 during power-on) that allows you to fine-tune: Updating without the correct file can permanently "brick"