Length: 3"Width: 2"Projection: .25"Center To Center Spread: N/AFinishes: Brushed Nickel, Oil Rubbed BronzeArrives in an attractive box.Note: This is a decorative doorbell button. Does not include electric doorbell mechanism. For use in replacement of front entry decorative plate and lighted button only. Item connects to your existing 16 volt doorbell wiring.