Spyder Fenix Electronic Paintball Marker Air Efficient EKO Valve System (Patent Pending) shoots up to 1600 shots from a 20 oz CO2 tank-''Synergy Engineering'' Low Pressure Dual Air Source System Overall Profile (25-Percent Lighter and 15-Percent Shorter)-25 BPS rate of Fire-3 Modes of Operation (Semi-Auto, Ramp PSP, and Ramp Millennium) LEAP II Circuit Board with Rear Facing Color Access Mode Display (CAMD)-Break Beam Eye (Anti-Chop System) 3 Way Adjustable Magnetic Response "Saber" Trigger-Recessed Dual Texture Grip Panels-High Impact Polymer Trigger Frame Fast Charge Adjustable Inline Regulator-Standard Thread CA Vertical Adapter-External Velocity Adjuster-All Aluminum Constructed Body-Compatible with a Spyder 9.6v Rechargeable Battery or a Premium 9v Alkaline Battery (not included).