The smart mirror consists of a two-way mirror. A two-way mirror is basically a glass panel that can be seen through from one side and a mirror on the other side.
The display panel is a very slim monitor. It is built-in the panels of a two-way mirror. It is thick so it can fit simply in the two-way mirror. You can also know more about apple smart mirror display online.
Image Source: Google
In order to prevent the disruption of the smart mirror, it consists of only one color is a monochrome display, but there will be little change in color when the weather is cloudy.
Scientists have conducted several experiments before being satisfied with the prototype. They said that it is a work in progress and would like to add Google Now cards for smart mirrors to get traffic updates, birthday or event reminders, and even voice search.
A Fire TV stick is basically used to control the display of smart mirrors. It is connected to the controller that converts HDMI output Fire Sticks into the data that can be transferred via a cable 40 pin.
Data shown in the mirror is obtained by using the Android API. All the circuit boards with wires that are behind the screen and the whole setup are given one small single push switch to turn on and off.