Built-in AM/FM radio with 10 preset options. Hands free communication for the party receiving the call. A Portable Music Player to plug and play downloaded or streamed music, USB connectivity to charge your MP3 device as it plays. Bluetooth Receiver sets inside the docking area to stream music. The ability to select from 2 music source options in every room, enabling different music sources to be played in different rooms. Door chime selection, Optional door release., The ability to monitor single or multiple zones. Automatic Selective Call Technology: calls are broadcasted throughout the home, but once the call is answered, it becomes private between the stations in use. The Intrasonic Retro Intercom Kit is a replacement for older model M&S Intercom Systems. This package allows you to use your existing wiring when replacing your old intercom system. Kit includes, Master Station White RETRO-M, Master Trim Frame White RETRO-MTP, Retrofit Room Station White RETRO-5R, Room/Patio Vertical Adaptor and Trim Plate White RETRO-5RV, Retro Door Station White RETRO-D, Retro Personal Music Player Door White NEW STYLE, Bluetooth Receiver BT-Receiver