This Easy Harmony XB2 modular light block is assembled with a metal body/ fixing collar and 2 NC contact blocks. It is supplied with 380V AC and does not come with a BA9S bulb. Simply adding an illuminated push button head and BA9s bulb to this assembly will provide you with a complete ready-to-use push button. It is easily installed with compatible illuminted push button heads. It is easily installed into standard 22mm diameter panel cut-outs and connected to control circuits with classic screw-clamp connections. Its schematic is clearly distinguishable thanks to clear markings, minimizing errors during initial wiring and later maintenance operations. Its wide range of operating temperatures from -25°C to 70°C allows versatility in usage of product. It protects operators from unexpected contact with live circuits thanks to its IP20 protection index.