Want a wireless doorbell but long for the rich sound of a traditional mechanical chime? Heath Zenith"s SL-6505 gives you just that-the chime unit for this wireless system includes two tone bars for the classic "ding-dong" sound.To install, all you need to do is mount the doorbell and chime-no electrical installation is needed. You can select from up to 128 code settings (which allow the doorbell to communicate with the chime) to make sure your neighbor"s wireless systems won"t set of your chime. If you wish, you can also change to a single-note chime.Note that, although the battery for the doorbell is included, you will need to supply four C batteries for the chime. Mounting hardware is included.--Josh DettweilerWhat"s in the Box Wireless chime, wireless push button with battery, hardware pack