Stealth Boy (Fallout)

The RobCo stealth boy 3001 is a personal stealth device worn on one's wrist. It generates a modulating field that transmits the reflected light from one side of an object to the other, making a person much harder to notice (but not completely invisible).

Nightkin NPCs can be seen using stealth boy, however, their usage is entirely cosmetic. Unlike the mechanics of traps, the player does not have to make a saving throw in order to spot nightkins. However, if the player uses the stealth boy and begins a fight in a room with locked doors, enemies from other rooms won't be triggered to join the fight.

Locations

 * Giant Footprint special encounter - on the body of a dead peasant
 * Dr. Who special encounter - left behind after the booth disappears
 * The Glow Level 5 - in a locker
 * Cathedral Tower (All Floors) - on the nightkin sentries
 * Cathedral lair level 3 - in a locker

Fallout 2
Oddly, no stealth boys appear anywhere in Fallout 2. Even nightkin patrols near Mariposa Military Base do not have any remaining devices. Although, it can be found in the game's files. However, one item in Abbey on Fallout 2 Restoration Project can be found

Стелс-бой Skrado Boy