SIRIUS Safety ES V20 Professional floating license for 1 user engineering software, software and documentation on DVD license key on USB flash drive, class A 6 languages; de,en,zh included, fr,es,it for download executable in: Windows 10 - 64-bit (Professional/Enterprise) / Windows 11 (Home/Professional/Enterprise) Windows Server 2019/2022 64-bit Standard reference hardware: 3SK2 online functions via system interface and optional DP/PN interface