The IMA4406 radio-intercom with CD player provides total home communications and superb music distribution. An excellent way to add value and convenience to any home. Answering the door is just as easy from any speaker. Think of the added security and convenience of screening visitors without having to open the door. And, never miss a guest by adding an optional chime to your system that will play at every speaker location in your home. There's even an optional chime that plays 10 different musical tunes. How many times have you walked down the hall or up the steps to check on the baby, a small child or a person confined to bed? With the IMA-4406, you can monitor any room from all other speakers as you move from room to room. no heavy receiver to carry or wear on your belt, no batteries to replace, no signal dropouts that occur with wireless baby monitors.