use the 3 channels constant decoder, which take advantage of advanced control technology. This technology changes the fashion DMX512/1990 standard digital control signals into analog control signals.There're 1 ~ 3 output channels; each channel can achieve 256 control levels. This constant decoder is used when DMX512 control equipment control general LED lighting.<br><br>Due to different product batches, the appearance may be different, which does not affect use. Colour:Black Material:plastic+metal<br><br>Package Contents: 1 x RGBW4CH DMX 512 constant decoder 1 x English User Manual<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.