To program your Code 3 Z3 siren, you will primarily use the Matrix Configurator Software available directly from the Code 3 website

Alternatives if You Can’t Find the 2021 Version

If the 2021 software is no longer available, consider these options:

Official Matrix Configurator: Download the latest version directly from the Code 3 ESG Software Page.

Hardware Setup: Ensure the siren is powered correctly (Ground and Power connected) and that the ignition wire is not hooked to power while attempting to connect via USB. Configuration Procedure Code 3 Z3 Matrix software - missing USB/CD | eLightbars

Where to download (guidance)

The question burning up forums in 2021 was: Where can I download the Code 3 Z3 software this year?