* Will fit standard CO2 bottle * CO2 regulator is automatically regulated and does not require a 2nd gauge or knob * Electronic non-stick solenoid * LED indicator light to show open (energized) solenoid * Glass bubble counter with large gasket seal * Precision adjustable micro needle valve * Output pressure gauge * Includes silicone tubing 20 feet (6 meters) * Extra replacement gasket kit * AC Adapter-110 VAC North America * Adjustment screwdriver * 12 month warranty is the best in the industry * For more details, see the Users Guide. This is an excellent Regulator/Solenoid for any hobbyist who is automating a calcium reactor or setting up a freshwater planted aquarium. Very quiet, reliable, non-stick operation. Precise needle valve to dispense exactly the flow desired. The PINPOINT CO2 Regulator Solenoid is the Cadillac of regulators.