Iroad Firmware [verified]

from official site for your exact model.

The iRoad firmware is a type of software that is used to control and manage the functions of iRoad devices, which are typically GPS navigation systems or other types of electronic devices used in vehicles. The firmware is responsible for managing the device's hardware components, such as the GPS receiver, display screen, and memory storage, as well as providing a user interface and controlling the device's various features and functions. iroad firmware

If you brick the device or can’t update: from official site for your exact model