Wired Electronic Door Chime. Ideal For New Installations Or to Replace A Wired Doorbell That Is Working. Features 3 Premier Sounds: Traditional 8-Note Westminster, Traditional 2-Note, and Traditional 1-Note. Easy Installation, No Special tools Required. Volume Control to Adjust Loudness. Chimes Are Selectable For Both Front and Back Doors. Includes Chime, Diode, Screws, and Instructions. Wired Push Button Sold Separately. Weighs 0.75 Pounds. 2 Year Warranty.