OKY3900 is a navigation module developed by OKYSTAR, a leading positioning technology provider. It is a full-featured system-in-package (SiP) module with a built-in GNSS receiver and sophisticated electronic components. It provides accurate and reliable positioning, navigation and timing services, and supports a wide range of applications. It is easy to use, and provides a perfect combination of low power consumption and high performance. By integrating various antennas, antennas switches and front-end filters, it can accurately and quickly determine the location, timing and velocity of a user. Additionally, OKYSTAR has built-in its proprietary error-detection algorithm, making the performance of the hardware extremely reliable. The module supports a wide range of frequencies, including GPS L1/L2, GLONASS L1/L2, Galileo E1/E5A/E5B, and BeiDou B1/B2/B3, so it can be used in any region worldwide.