For SL04 boxes with firmware versions earlier than V6.5, the DMX512 refresh rate was 40-44Hz.
We found that some older lighting fixtures, due to insufficient processing speed, might not be able to handle high refresh rate DMX data over a long period, which could occasionally cause flickering. Although this is an issue with the fixtures, customers may think it is a problem with our control box. To be compatible with some older lighting equipment, the firmware version 6.7 lowers the DMX512 refresh rate to 30Hz.
The main difference between firmware V6.5 and V6.7 is the DMX512 refresh rate, everything else remains the same.
V6.5 DMX512 refresh rate: 40-44Hz
V6.7 DMX512 refresh rate: fixed at 30Hz
Additionally:
The automatic upgrade by yourself software is not yet complete. If you need to upgrade to version 6.7, it can only be sent back to us for upgrading, or you have to wait until the automatic upgrade software is finished to upgrade it yourself.