Sain Tray Electron (STE) located in Haizhu district of Guangzhou, is a high-tech enterprise group specializing in the R&D, manufacturing, sales of high-tech electronic products. Our company was established in 2002, specializing in providing products of high quality based on ISM FR and embedded wireless communication, as well as offering the related application solutions about Internet of Things. What's more, our products are characterized by small size, low power consumption, long distance, strong anti-interference ability, simple interface, low prices, and stable performance....