The RB-VO marked key (RB-VO mrk.) is a Key in Escape from Tarkov. Military base Internal Security Forces barracks key with multiple strange symbol scratched on to it where the room label would usually be. The key is stained by blood and appears to have been misused a lot, making it fragile. Only 2 can be held in your PMC inventory at one time In Jackets Pockets and bags of Scavs Left room, in ....