1, the fifth generation of Haifei Hydraulic Machine adopts advanced vacuum negative pressure technology, which can effectively transport nutrients to the deep skin and improve the therapeutic effect. The fifth generation is stable and cost-effective, suitable for beginners and users with limited budget.

2. Six generations of Haifei Water Machine pay more attention to details and effects, with higher spraying frequency and thinner nozzles, which can better deliver nutrients to the deep skin and improve the therapeutic effect, and the price is relatively high.