1. Dual gauge can check the pressure in the CO2 cylinder and working pressure, safer and more reliable.
2. High precision built-in safety valve, automatically release pressure when exceeds 100PSI.
3. 12V DC solenoid valve, more stable and safe, consumes less power.
4. CGA320 and W21. 8 two standard threads
5. Bubble counter with built-in check valve
6. App control, auto timer switch(Controller purchased separately)
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We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.