Rezzables are a special form of item, which instead of being rezzed on the ground and activated like weapons or worn like Accessories, Rezzables are installed into the HUD by taking the box given and installing the rezzable to the HUD. The rezzable items don't transfer between HUD versions, so keep ahold of the boxes for later TiS versions.
Type or Rezzables
There are currently 2 types of Rezzables in the system. Offensive Rezzables, and Support Rezzables