Colour:Black Material:PC type:GP-01-Kit Package Contents: 1 x Modules(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. The main chip is AT6558R satellite positioning chip. Integrated radio frequency front end,digital baseband processor,32-bit RISC CPU,power management and active antenna detection and protection functions. it follows the NMEA protocol and sends instructions through serial communication to control the work content of the development board. it is a highly integrated SOC development board with ceramic antenna and high performance BDS/GNSS multi-mode satellite navigation receiver. Support a variety of satellite navigation systems,including China's BeiDou Navigation Satellite System (BDS),the ' GPS,and Russia's GLONASS,which can realize multi-system joint positioning.