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 DMX” on AliExpress then can find SL04 box, or maybe try other text can be search this box, if box picture like our website then it our SL04 box, don’t worry, all SL04 box is made by me.
if you want Taobao link can contact us, or searching “MA3 MA2 RDM DMX512” text on Taobao.com then can find SL04 box.
Contact me:
WeChat: hahan4567
Email: 1195722899@qq.com
Thanks！