Product features: Connect to paintball CO2 tank, no adapter required. PLEASE NOTE: please fill up your CO2 paintball tank if you purchased the tank online (e.g. Amazon) before using the regulator. The CO2 paintball tank is shipped empty due to safety concern. Cool-touch industrial solenoid design. Precision needle valve for fine tuning release of CO2. Include bubble counter with integrated check valve. Compatible with most CO2 atomizer and diffuser. Compatible with 1/4 or 3/16 inch CO2 gas line and most high density tubing. Bottle Pressure Gauge: 1,500 PSI Max. Reduced Pressure Gauge: 200 PSI Max. 110 and 220 volt universal power design. Heavy duty electronic cabling. The compact space-saving design of Aquatek CO2 Regulator with Integrated Solenoid Valve for Paintball Tank is ideal for smaller set-up of CO2 systems. Eliminate the need to purchase paintball tank adaptor and unsightly industrial-size CO2 tank, this all-in-one unit is perfect for calcium reactor and freshwater plant CO2 injection applications. The Aquatek CO2 Regulator for Paintball Tank is equipped with dual gauges (psi & kg/cm); the left gauge measures tank capacity and the right gauge measures output working pressure. With its fine tuning capabilities and electronic regulation, this CO2 Regulator meets the highest industry quality standard. (PLEASE NOTE: Paintball tank is NOT included, for demonstration purposes only).