The Harmony modular push buttons, selector switches, and pilot lights are designed for industrial applications, offering a simple setup, flexibility, and robust construction. The range features an ingenious locking system with a snap fit head and body that can be easily tightened with one screw, ensuring secure mounting. Available in two versions, the XB4/ZB4 and XB5/ZB5 models cater to different needs, with the former featuring chromium-plated metal components and the latter using plastic modules with round and square bezels, all meeting international standards such as EN/IEC, UL, NEMA, CSA, and others.