Diamond target teleporters enable you to create a portal from one point on a world to any other point on the same world. They are found in the Engineering section of inventory.
How to Obtain
Diamond target teleporters can be crafted, looted from mechanical chests, or obtained by trading with other players.
How to Use
Place the teleporter where you want the portal to be. A dialog box will pop up with fields for you to enter to coordinates of where you want the player to be teleported. Note that to assign a location above level zero, you must prefix the Y-coordinate with a minus sign.
The assigned coordinates must be in an already-explored, unprotected part of the world (unless that protection is from a protector that belongs to you).
Diamond target teleporters were added in January 2015.