2 1/2 Inch Solid Brass Art Deco Style Doorbell Button (Several Finishes Available)2 1 2 Inch Solid Brass Doorbell Button Measures 2 1 2 Inches by 1 1 2 Inches Uses 24 Volt Maximum (Standard Doorbell Circuits) Center to Center Mounting Distance is 1 3 4 Inch Usually Ships In 2 to 4 Business Days Hardware Included Yes Sold As Individually Architectural Style Art Deco Warranty Limited 5 Year Warranty This doorbell button mounts with two brass screws (included) and it has two lead contacts on the back. Measures 2 1 2 inches by 1 1 2