BioPak 240 Revolution Preliminary Highlights 4-Hour Self-Contained Positive Pressure Closed-Circuit Rebreather No mandatory replacement parts or factory rebuilds required for the life of the unit Features the Scott AV3000 facepiece, three sizes with multiple sized nosecups Lighter and smaller than the BioPak 240 and BG-4 Dimensions: L 23.0 X 17.3" X 7.0" (584 X 439 X 178 mm) Weight: 33 pounds (15Kg) Cooling system can be changed during use with out breaking the breathing loop and without opening the upper housing. See the two caps on the left side of center section. Reliable mechanical pneumatic gauge, no electronics outside the unit. Fiber optic warning lights: low battery, low ice alarm, 25% end of service life alarm, and normal operating mode Lowest breathing resistance available in closed circuit at all work rates (Easiest unit to breath), over 6 liter tidal volume. Smaller cylinder 444 liters @ 3000 psig. Threaded positive cylinder connection to regulator. All external materials constructed of fire rated materials and designed to pass NFPA 1981. Revolutionary worry free CO2 scrubbing system 100% error free filling. Never under fill. Confidence of CO2 removal Solid scrubber design Seconds to change/install versus 5 to 10 minutes in current design Significant reduction of storage requirements, concerns Never worry about settling Simplified washing and disinfecting