Colorlight S-Series LED Display Controller S2 LED Sending CardS2 Sending Card As a new generation of sending card, S2 has updated its core chips, and the performance significantly improved. It adopts dual USB2. 0 as the communication interface to achieve high speed communication between the PC and sending cards. S2 realizes cascading between multiple cards and much more convenient. Moreover, it equips PCI E 1X interface, which is more versatile. S2 can be applied to small display perfectly. DVI signal input port