The Calypso Pro (multi-user) is designed for loaner and rental programs with increased durability and warranty compared to single-user Calypso. Features independent vacuum and cycle adjustment – 64 total settings. “Vacuum Seal” technology (when used with Ardo pumpset) creates a closed system — no milk in the tubes or pump. AA Battery function for operation away from electric power. Rechargeable battery pack available separately (coming soon). WHO Code Compliant.