Terraria: Teleporter manufacture and use

The Teleporter transported them in Terraria in the shortest time from A to B. Here you'll learn how to make the futuristic machine and use.

Terraria - Teleporter buy

The Teleporter is only get in Hardmode to. You can buy the machine only, and not even crafting.
Defeat the three Mechanical Bosses. These are "The Destroyer", "The Twins" and "Skeleton Prime".
After you have killed one of them, a character by the name of steam punk (see picture), sold them to the Teleporter. The price is 2 Gold and 50 silver coins.

You can buy two teleporters and place them at the desired places.
Now you need a wrench, 2 buttons and a lot of cable. The number of cables required depends on the distance between the two teleporters.
You get all these Items for a little money in the character "Mechanic". This can release you from the Dungeon by "defeat Skeleton Prime".
Now insert a cable line from one Teleporter to another. You provided both with a switch button and connect the whole with the wrench.
Now you can travel freely back and forth. A Teleport operation will cost you neither money nor Mana.
Also other NPCs, animals, and even enemies can be transported with the machine.