The Translocation Plate is one of the Plates added by Thermal Expansion. When touched by entities, it teleports them a configurable amount of blocks away from the Plate in a certain direction. This works even when there are other blocks in between; in other words, the Translocation Plate works through walls. However, it doesn't work if the destination itself is blocked.
The Plate can be placed on any side of a block. The direction it points in can be changed using a Crescent Hammer or similar, as well as in the Plate's GUI.
The Translocation Plate can be configured by sneaking and using a Multimeter on it. The Plate's GUI is then opened: