Nanotech-assisted targeting system.
Iron Man Backplate backpack is a Marvel Fortnite Backpack from the Iron Man set. This back bling is one of the Fortnite Battle Pass cosmetics in Chapter 2 Season 4. You can get it once you have reached Tier 89. Back bling Iron Man Backplate is reactive. It means it changes or evolves (reacts) depending on certain things in game (damage dealt to opponents, if it's day or night...)
The Set Iron Man contains 6 cosmetic items.
The backbling Iron Man Backplate belongs to Chapter 2 Season 4. This backbling is available as a reward by unlocking Level 89 of Battle Pass from Chapter 2 Season 4.