From the picture you can find

the difference to VSP 526.

1.     Did not support audio in and out; 2.     Did not support SDI input module, which is S module of VSP 526; 3.     Did not support mosaic module, which is P module of VSP 526; 4.     Support 2 CVBS input only,VSP 526 is 3 inputs; 5.     Did not support Svideoinput; 6.     Did not support component input; 7.     Support install two sending cards, LINSN(Zedec V8 is thesameto LINSN)or DBStar; VSP 526 can support 1 sending card in P modulespace;

8.     Support USB control and firmware upgrade only, which VSP 526 support IP based (TCP/IP) and RS 232, two more options;

This video processor islow cost version for mobile LED application, fixed install for sign and billboard, small rental.