This Harmony XB4 illuminated modular blue push button operates with a spring return mechanism, is supplied with 110V to 120V AC, uses an integral LED. It has a metal bezel. This illuminated push button provides an ergonomic and visual interface for controlling your machines. It is easily installed into standard 22mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections. It is clearly distinguishable visually at a distance thanks to a bright and long lasting LED illumination. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66 / IP67 / IP69 / IP69K, making it ideal for operation in harsh environments.