Founded in 2004, Shanghai Sunray Technology Co., Ltd is a dedicated to design and manufacture of wireless modules, with strength of more than 60 R&D members who accumulate rich experience in RF industry. Those modules are half-duplex, working on license-free ISM frequencies band (403, 433, 470, 868, 915MHz) with low power consumption, and provide UART TTL, RS-232, RS-485 serial ports. With our high quality and low cost products, you are able to setup a simple wireless transmission efficiently instead of the complex wired deployment. Reliable RF line-of sight range could be up to 70~4500m. Thanks to the perfect performance of those items in wide industrial application, such as Automated Meter Reading, Remote Control, Environment Monitoring, Intelligent Control for Lighting Management System, Dishes Ordering system, LED Display Screen Control, Queuing management system etc., we get good reputation and enjoy long term mutually beneficial business relationship with many domestic and international customers. Now 700, 000 pieces of modules are produced every year. All the process complies with ISO 9001: 2000 standards. When you see them, we think that you will agree that only the best quality materials are used, and that the high standard of workmanship will appeal to the most discriminating buyer. In addition, you don&＃039;t worry the cost. It is quite low, and will bring you great convenience. Welcome your OEM/ODM request. Inquiry now.