I have had in their hands in the past many of these control units and seen in the installed state. However, no flickering in a modern CAN bus vehicle and top quality features of these control units and make all the difference to the often offered "China scrap". These goods justify the high purchase price. A pity, however, is that the matching burner are not included and you have to get them elsewhere. That's why I forgive even four stars. Had the corresponding burner included, I would also assign the full five stars. For me, the delivery of a so-called. Xenon kit includes namely the control units, incl. The associated burners and suitable installation materials.