About the Product/Series The most powerful controller in the warning industry, the 4200 DataLink controller is ideal for professional use and emergency vehicles. Universally compatible and fully programmable, the 4200 DL provides control over an extensive lighting and siren system. Click to download 4200 DL software 2021 - Present Click to download 4200 DL software prior to 2018 Click to download 4200 Non Data Link Click to download 4200 DL software 2021 - Present Click to download 4200 DL software prior to 2018 Click to download 4200 Non Data Link