Schneider Electric XB4BW28B5 Push-to-test pilot light, Harmony XB4, metal, amber, universal LED, screw clamp terminals, 24V. This Harmony XB4 plain lens push to test modular yellow pilot light is supplied with 24V AC/DC, uses an integral LED. It has a metal bezel. Under normal conditions, the push-to-test pilot light is providing a best-in-class illumination to service your panel signalisation functions. During maintenance, one push on the head is enough to test the lamp and to confirm its good health. 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: Push-to-test pilot light; Device short name: XB4; Bezel material: Metal; Fixing collar material: Metal; Mounting diameter: 22.5 mm; Sale per indivisible quantity: 1; Height: 42 mm. 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.