Colorlight sending cards have powerful video signal transmission ability, including sending boxes: S4, S6F series, support DVI, HDMI high-definition signal input and loop-out,receiving up to 1920 * 1200 pixels high-definition digital signals;Colorlight S2 sending card or S2 sending box uses high-speed dual USB as a communication interface for computer transmission between cards. Supporting low brightness and high gray, AC 100 ~ 240 V ultra-wide voltage and stronger adaptability;Colorlight sending cards also have a series of practical functions, which have a lot of advantages in production testing and engineering applications for various LED screens.