The detonator is specifically used to detonate C-4 after it is planted. The tool itself has no other use, and is useless against opponents by itself.
- Loyal's detonator is given to you by Loyal to activate a buoyancy device.
- Honest Hearts Mining detonator, used to collapse the cave in River Monsters.
- Old World Blues (add-on) Broken detonator, can be found in the Little Yangtze watchtower. It is considered a miscellaneous item.
- One can be found in the Vault 34 Armory along with 3 C-4 plastic explosives.
- Two can sometimes be bought in the Dino Bite gift shop in Novac.
- One can be found in a footlocker located at the road block on the road east of Novac where Ranger Milo is stationed along with two C-4 plastic explosives.
- One can be found in the Lucky 38 casino on the cocktail lounge floor in a hard locked briefcase.
- One can sometimes be bought from Chet in Goodsprings General Store
- Sometimes they can be bought from the arms merchant at the 188 Trading Post
- One can sometimes be bought from Blake at the Crimson Caravan Company.
- One can sometimes be purchased from Lacey at the Mojave Outpost.
- Dead Money One can be found in the Sierra Madre along with 3 C-4 plastic explosives. Enter the Police Station via the west doorway. Turn north at Dog's cell to enter a short hallway & face west. Enter the first door on your right. In this room in an Average locked locker leaning in the north west corner of the room.
- Traveling merchants rarely carry them
- Michelle at the 188 trading post will always restock on a range of around 1-4 every three days.
- C-4 cannot be detonated remotely if you do not have a detonator. However, one can shoot it when it's placed on the ground to detonate it as an alternative method.