Schneider Electric XB4BW73731B5 Illuminated double-headed push button, metal, Ø22, 1 green flush I + 1 pilot light + 1 red projecting O, 1 NO + 1 NC. This Harmony XB4 double-headed modular push button has 1 red, 1 green button and 1 central white pilot light, operates with a spring return mechanism, is supplied with 24V AC/DC. It has a metal bezel. It is marked with "I" and "O" symbols. 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. Official Schneider characteristics include Range of product: Harmony XB4; Product or component type: Illuminated double-headed push-button; Device short name: XB4; Bezel material: Chromium plated metal; Head type: Standard; Mounting diameter: 22.5 mm; Colour of marking: White marking when green, red or black caps Black marking when white caps; Light source: Protected LED. Harmony XB4 devices use a chromium-plated metal bezel and are designed for robust panel operation where clear manual control, indication or machine safety interfaces are required.