"THOMAS & BETTS" WIRED DOOR CHIME KIT Contractor. Wired Door Chime Kit. One or two door operation. Includes Chime,16V, 10VA Transformer. One lighted gold push button and one lighted white push button. Sounds two notes for front door and one note for back door. 7 1/2"H x 3 7/8"W x 2"D Boxed.