Multiple display device installation

A method of installing multiple digital display devices, comprising:

• providing multiple digital display devices, each digital display device including a display screen, a memory, and a processor;
• physically and electrically connecting a hanging system to the multiple digital display devices, the hanging system comprising a bar and hanging wires extending from the bar to each digital display device of the multiple digital display devices;
• connecting a power adapter to the hanging system, wherein the power adapter converts power received from a power source to direct current power and distributes the direct current power to each digital display device of the multiple digital display devices through the hanging wires;
• and
• connecting a master data modem and multiplexing module to the hanging system, wherein the master data modem and multiplexing module embeds an external data signal into the direct current power and distributes data to each digital display device of the multiple digital display devices through the hanging wires.