SIMATIC STEP 7 Professional V20 Combo Legacy; upgrade V11/2010..V16/2017 Combo-> V20/2021 SR3 Combo; floating license; including S7 PM; engineering software in TIA Portal; software and documentation on DVD; license key on USB flash drive; class A; 9 languages: de,en,zh included, fr,es,it,ru,ja,ko as download; for configuration of SIMATIC S7-1500/1200/300/400/WinAC, SIMATIC Basic Panels, SIMATIC Unified Basic Panels. for system requirements specification, see www.siemens.com/compatool -- content: set (5x DVD + 1x USB)