New AERIS Hi-Pressure Quick-Disconnect Hose for AERIS XR2, AERIS ATMOS 2 & AERIS 500AI Fits on the following Aeris Instruments....AERIS "XR2"AERIS "ATMOS 2"AERIS "500AI" High Pressure Quick Disconnect Hose Secure Quarter-Turn Quick-Disconnect Fitting Simple to Use Use for Downloading Dive Information During a Trip