Shenzhen Top Technology Co. Ltd. is a professional LED manufacturer and ranks the top five in China, it has over 400 workers. Over the past 6 years, we have cooperated with over 100 countries, and all of our products have passed the certificates of UL, CE, FCC, ROHS, etc. and our major products are indoor/outdoor full color display: for instance, PH6, PH8 ,PH10, PH12, PH16, PH20. quality is our life and motivation..We sincerely hope we can help everyone needed, if you have any interest in any of our products, please contact me daisy(at)ledtop1689dot)com