Shenzhen ADD Tech Co.,Ltd Shenzhen ADD Tech Co.,Ltd is a manufacturer of the led electronic displays located in Shenzhen China . With more than 10 years experiences on making and supplying the led electronic displays , ADD Tech has established many domestic & overseas customers . ADD Tech mainly engages in the design and production of LED full color video displays , solutions of outdoor advertising , visible solutions for events , sports ,movable ad ,etc. We pay more attention to the quality control from the foundation of ADD Tech . By the strict management during the material purchasing , production , and aging , all of our LED products have proved EMC and LVD directive of CE certification , RoHS certificate, CCC compulsory certificate . We are also trying to purchase the components which are UL proved . ADD Tech has became a reliable supplier by all team continuous fighting . At present , the main LED Electronic Displays products of ADD Tech are as follows: 1. LED Digital Billboards 2. LED Outdoor Full Color Advertising Displays 3. Indoor Full Color SMD LED Displays 4. LED Stadium Perimeter Displays (Football / Soccer / basketball / Volleyball , etc.) 5. LED Events Displays (for rent / sports / concerts / fairs / exhibitions / ceremony, etc.) 6. LED Stage Background Displays 7. LED Electronic Scrolling Message Signs 8. LED Digital Signage Please inquiry more by e-mail to sales@szaddtech.com