Wearable tech is equipment that can be used by NPC's (non-player characters) on your battlefield. 

Melee box

Quester

With a Melee Box you don't have to shoot at the players - just get close enough to them and the infrared sends a signal to the player, hurting / infecting / wounding them. ​

The quester allows actors to shoot players without having to wield a (visible) weapon.