If you need a sample, maybe you can buy it from here: http://www.aliexpress.com , we have some agents on AliExpress.
You can search text “SL04 MA3 DMX box” on AliExpress find SL04 box.
if you want Taobao link can contact us, or find SL04 box by searching “MA3 MA2 RDM DMX512” text on Taobao.com.
Contact me:
WeChat: hahan4567
Email: 1195722899@qq.com
Thanks！