This is DUOAO Corp, we have the our core hardware and software.We offer(OEM or ODM):Elevator Access system(lift Access system);Door Access system;parking system;Smart channel system(swing,wings,Tripod rurn);Smart Attendance,Charge,patrol management system.Welcome to know more DUOAO products and services.SHENZHEN DUOAO TECHNOLOGY CO.,LTD ,belongs to a wholly-owned subsidiaries of Hong Kong OTT Allianz Group, is established for the better development of the mainland business. We have concentrated on the R&D of Smart Card Management System about 12 years and own our core technology and our brand. DUOAO focus on production and sales of high-tech products of IC card elevators, elevator IC card, elevator access control, IC card access control, parking, smart channel, smart attendance/charging/patrol and other smart card such as ID card, CPU card.DUOAO Vision: Become the world's most valuable Smart Card Management System manufacturer and ISP.DUOAO Mission: Cooperation , Win-win and Development.DUOAO Value: Customers' satisfaction promote our team to develop continuous innovation.