Universal compatibility: this doorbell push button is compatible with all Byron wired doorbells, making it a versatile choice for both installations and upgrades to existing systems Durable outdoor performance: crafted from metal with a sleek chrome finish and boasting an IP20 rating, the Byron DBW-21028 Wired Door Push is built to withstand outdoor conditions, ensuring longevity and reliability in any environment 2-wire installation: featuring a 2-wire installation method, this doorbell push button simplifies setup while ensuring safety; no need for complex wiring—simply pull the necessary cables and remember to switch off the electricity before installation for a seamless integration into your existing wired doorbell system Illuminated response: the push button illuminates when pressed, providing a clear indication that the doorbell has rung inside the house Expandable: this bell push button is expandable, allowing you to customize your doorbell system to suit your needs, Weight: 0.1873929227 pounds, Manufacturer: Byron