XRT Pro SCBA Trainer. XRT Pro® is a resistance breathing trainer adapter for SCBA masks worn by firefighters and first responders.With a simple turn and click – the XRT Pro is compatible with the Scotts SCBA - AV 2000 and AV 3000.XRT PRO allows first responders to add breathing training to their functional on scene simulation workouts.XRT Pro® offers 6 on-the-fly resistance levels to increase workout intensity and to mimic low oxygen conditions when O2 tanks run low.Emergency situations are unpredictable and demand a lot from first responders physically.Get the edge you need to be sharper and more on point when it matters most with XRT Pro