SIMATIC STEP 7 Professional V21 Combo Legacy upgrade V11/2010..V16/2017 Combo-> V21/2021 SR4 Combo floating license DL including S7PM engineering software in TIA Portal software, documentation and license key for download 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 -- software class A consignee email address required for delivery.