Heath Zenith 79/M Traditional D&eacute;cor Series Wired Door Chime, Solid Oak with Satin Brass Tubes Hardwired door chime (powered by 16-volt/10-watt or 16-volt/15-watt transformer) For use with hardwired doorbell systems Distinctive 2- and 1-note chime melodies distinguish front and back doors Wired for use with two doors Solid oak cover with satin-brass finished tubes; 7 by 2.375 by 8 inches