Heath Zenith Black/White Plastic Wireless Plug-In Door Chime Kit. The Chime features an 8-note Westminster melody or 2-note melody for the front entrance and a Ding for your back entrance. With its durable rectangular plastic body, this wireless push-button is not only stylish but also built to withstand the test of time. | Heath Zenith | | Black/White Plastic Wireless Plug-In Door Chime Kit | Best Buy