Basic white textured cover for a design that blends with builder finishing techniques for multi-family dwellings|For use with two entrances, two-note chime for front door, separate one-note tone for second 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 16 V transformer so you are assured of uninterrupted service and are never dependent upon batteries (transformer C905, included)|Two lighted rectangular shaped pushbuttons with non-stick action included so you have one less thing to buy and the convenience of a complete package|Refer to your local municipality building codes to be sure you are installing chimes that adhere to code since they vary by region