Heath Zenith 76 Wired Door Chime, Solid Maple with Brushed Nickel 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 maple cover with brushed nickel tubes; 1.8 pounds