Nine-tone navigation installs DuDu desktop software, which can be downloaded from the computer and transmitted to navigation through usb. Nine-tone navigation is a car navigation system, and DuDu desktop software is its supporting desktop management software. To install DuDu desktop software, please follow these steps:

1. Open a browser on your computer and visit the official website of Jiuyin Navigation or other reliable download sources.

2. Find the download page or download link on the website and choose the version suitable for your computer operating system.

3. Click the download link and wait for the software download to complete. Open the downloaded installation file and follow the instructions of the installation wizard. Usually, you need to agree to the software license agreement and choose the installation location.

4. After the installation, you can find the icon of DuDu desktop software in the desktop or start menu of the computer.

5. Connect the nine-tone navigation device to the computer with usb cable or other adapters.

6. Open the DuDu desktop software, which will automatically detect the connected navigation devices.

7. According to the prompt of the software, register and activate the device so as to use the navigation function normally.