SIMATIC STEP 7 V5.7 SP4 Chinese, upgrade; floating license for 1 user; engineering software; software, documentation and license key on USB flash drive; class A; 2 languages (en,zh); executable in Windows Server 2019/2022/2025, Windows 11 Professional, Windows 11 Enterprise; reference hardware: S7-300/400, C7 - - content: set (1x CD, 2x USB)