How can I distinguish the new WSS-25 from the previous version?

The new WSS-25 has a different appearance from the previous version. You can compare the product photos and dimension drawings of the two versions in Chapters 5 and 6 of this manual.

An easier way is to check the product label. The new WSS-25 has a production date later than May 2026, and its label is marked with the following Chinese text:

设备地址：13

This means Device Address: 13. (HEX:0X0D）

The following photo shows the label of the new WSS-25: