Which is the two-stage compressor of Gree air conditioner?

Cabinet: I Zun, I Zun II, etc. Hang up: U Zun, U Zun II, U Zun smart, etc. Gree's independent research and development, international leading two-stage variable frequency full enthalpy compressor and its control technology, through secondary compression, increase the air supply, high energy efficiency, good reliability, greatly improve the heating capacity in low temperature environment.