Worried that you won"t be able to hear the doorbell when you"re in the garden, garage, or basement? With Heath Zenith"s wireless doorbell system, you can simply pick up the chime and take it with you (it plugs in to a standard polarized socket). To install, all you need to do is mount the doorbell and plug in the chime-no electrical installation is needed.The volume of the chime is adjustable, and you can select one of three different chimes. You can also change the 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. Note that the battery for the doorbell is included, along with all the mounting hardware you"ll need.--Josh DettweilerWhat"s in the Box Plug-in doorbell chime, doorbell button/transmitter with battery, hardware pack