Works strictly only with the Infant Optics DXR-5 2.4ghz video monitor. * 2.4ghz wireless connection - interference and static free. Sets up in minutes. * Capable of expanding up to 3 add-On cameras (total of 4 cameras) together with your existing DXR-5 Infant Optics Baby Monitor (sold separately). * Included in the box: 1 Infant Optics ADD-ON Camera