Junsun V1 Pro Firmware Extra Quality -

If it doesn't, go to and select USB storage.

For most users, the factory firmware is already stable. If you do update, follow the guide carefully and keep a copy of your original firmware if possible. junsun v1 pro firmware

This is the most critical step. Do not skip it. If it doesn't, go to and select USB storage

If the screen is inverted or non-responsive, connect a USB mouse to navigate to the factory settings and recalibrate the touch parameters or change the "Screen Resolution" setting. This is the most critical step

If you purchased the unit from a storefront like the "Junsun Official Store" on AliExpress, the product page often contains a "FAQ" or "Description" section with download links. If not, you can message the seller directly. They are usually very responsive and will send you a Google Drive or Dropbox link to the latest firmware.

Improves the DSP (Digital Signal Processor) performance for better sound.

The firmware offers several advanced features designed to enhance the in-car experience, most notably the transition to UI 4.0 . Key Firmware Feature: UI 4.0 Customization