Television

The television is a form of technology that can transmit images from a video camera via the airwaves to a receiver that can display the images. Originally television used analog signals to broadcast and receive images, but by the early 21st century broadcasters have been shifting to using digital signals.

Mainstream Smurfs Media
In the cartoon show, the Smurfs briefly used a magical form of this technology called Window Vision which allowed the Smurfs to broadcast and receive signals through separate sets of crystals. Before that, Gargamel used two magic mirrors to broadcast an image of himself disguised as a salesman to the Smurfs with the receiving mirror so that they could be lured into a trap he created, a second Smurf Village that he called Smurfy Acres.