Features:
-Doorphone Controller Card
-Supports Up To 4 Door Intercom Stations
-Supports Up To 4 Door Relays
-One Button Push Allows You To Open Door
-Must Be Combined w/ KX-TDA0190
-Compatible with KX-TDA100, KX-TDA200, KX-TDA600, KX-TDE100, KX-TDE 200, KX-TDE 600