The DS-KH8350-WTE1 is a thin metal inner screen with a 7 inch color touchscreen. If a call is made from an outdoor station, it will be displayed on one or more indoor station(s) and, if desired, via the Hik-Connect App on your smart phone. The live images of outposts and / or linked cameras can also be viewed, and intercom calls are recorded on the internal storage of 32GB.This indoor unit is PoE wired or can be connected via your wireless network with a separate 12V DC power supply.