Broan BK140LWH Builder Kit Chime with Lighted Pushbutton and Junction Box Transformer, White Nullify Imported Basic smooth white cover with rounded corners for a fresh design that blends with builder finishing techniques Two-note chime for front door, so no guest will be missed Order as standard pack of 24 to assist with your planning and still retain that economical edge Chime wires to a junction box transformer so you are assured of uninterrupted service and are never dependent upon batteries (transformer C915, included) One lighted rectangular shaped pushbutton with non-stick action included so you have one less thing to buy and the convenience of a complete Package