It has a similar design to a detonator, the back casing is orange with an aqua-colored clear plastic top containing an electronic chip to the end and a concentration of lightning in the rest, with a barrel sticking out from the front attached via black tubes running down the sides. The antenna is also thicker with a spherical point, with its handle and trigger being similar to those of a weapon. In 2281, it was either given by the Think Tank to the Courier to thank them for their help or looted from the Think Tank after they were killed by the Courier.
When used in the Mojave Wasteland, it will teleport the Courier to The Think Tank, and when used in Big MT it will teleport the Courier to the Mojave Drive-in. It will not activate if the Courier is in combat or indoors. The Courier must also not have any active companions in order to allow teleportation.
Since the Transportalponder! isn't a weapon, it can't be used in V.A.T.S.
The Transportalponder! is regarded as an essential quest item and therefore cannot be dropped or removed from your inventory by any means.
If a Stealth Boy is used, the energy within the Transportalponder! appears green.
PlayStation 3Xbox 360 When you hotkey the weapon, the picture incorrectly shows the icon for Melee Weapons.
PC Upon being released from the Brotherhood of Steel in Hidden Valley, the Big Mountain Transportalponder! may not be returned.
PC The Transportalponder! may not function properly without armor equipped, and unfortunately causes the game to crash.
PlayStation 3 When using The Big Mountain Transportalponder!, the game might become slower than usual but will speed up after fast traveling or going through a door.
PlayStation 3 Attempting to use the Big Mountain Transportalponder! while enemies are just outside your detection radius may change your detection status from 'HIDDEN' to 'CAUTION' as if you just discharged an actual weapon, drawing the enemies to you.
Xbox 360 The Big Mountain Transportalponder! may disappear upon leaving the Sierra Madre.
Xbox 360 If you use the Big Mountain Transportalponder! after using the NCR Emergency Radio, the NCR trooper you called in will help you fight enemies and will follow you, despite the fact that any companions you have are not allowed to follow you into Big MT.
Xbox 360 Sometimes after using the Big Mountain Transportalponder! to transport to the Mojave Wasteland, a lone fiend will appear. Although appearing as hostile, they will not notice you and will keep on running into the distance.