You can easily check this in your NIU APP. The APP will tell you if you have the most recent software version.
Follow these steps:
1/ Go to the tab 'Me'.
2/ Click on your device.
3/ Click on 'OTA Updates'.
When a new version is available, you can install it OTA, Over the Air.
Simply follow the instructions in the APP.
If there is an issue during the OTA installation, you can contact your local dealer or send an email to firstname.lastname@example.org.