NuTone LA130WH Decorative Wired Two-Note Door Chime, High Gloss White 7-1/2-Inch wide x 5-3/4-Inch high x 2-5/16-Inch Deep High gloss white Two-note chime for front door, single-note for second door White finish Uses a16-Volt transformer(C905), sold separately 7-1/2-Inch wide x 5-3/4-Inch high x 2-5/16-Inch deep