What are the differences between digital billboards for indoor and digital billboards for outdoor?

What are the differences between digital billboards for indoor and digital billboards for outdoor? 

Digital signage is increasingly important these days, and it is estimated that this market may grow with a Compound Annual Growth Rate - CAGR of 7.3% in the next four years. 

But how to distinguish digital billboards for indoor and outdoor?

 Objectives:

1.Outdoor digital billboards seek to attract the attention of the audience.

2.Internal digital signage aims to transmit personal and specific information.

 The target audience:

External digital signage approaches citizens on the street.

Indoors, citizens know what to expect and are interested.

Interactivity:

Although interactivity is present inside and outside, it is more appropriate in closed places, since it is normal for the monitors to have interactive resources, enabling response to requests, entertainment and navigation.

The hardware:

1.The requirements for an internal environment are easy to understand, since there is stability and total control of the environment.

2.Outside there are several precautions that must be taken. On sunny days, the brightness must be increased in order to combat sunlight. As it gets dark, it should be adjusted automatically.