Wireless Video Intercom Kit Includes 1 exterior video doorbell camera and 1 interior intercom which receives camera images Camera transmits images from front door to intercom(s) Interior intercoms can communicate audibly with each other Cameras have long life battery but can also be powered via existing doorbell wiring and extender cable Interior intercom has AC plug in power cable, surface or tabletop mount via integrated easel back and up to 3 interior intercom per system