... recovery, regeneration, vacuum,filling(oil,refrigerant)and monitoring. Manually-operated Refrigerant Recovery and Filling Machine HS-520Connection:1 ... R404a .Features: functions for recovery, regeneration, vacuum,filling(oil,refrigerant)and monitoring. large screen LCD display ... special canned refrigerant connector for different users.Technical Data:working valtage:220V/50HZworking temperature: 10-40 ' ...