This Grove - GPS module is a cost-efficient and field-programmable gadget armed with a SIM28 (U-blox 6 is old version) and serial communication configuration. It features 22 tracking / 66 acquisition channel GPS receiver. The sensitivity of tracking and acquisition both reach up to -160dBm, making it a great choice for personal navigation projects and location services, as well as an outstanding one among products of the same price class. Features Input Voltage: 3.3/5V BaudRate: 4800 - 57600( u-blox version) BaudRate: 9600 - 115200 Default BaudRate: 9600 Supports NMEA and U-Blox 6 protocols. Low power consumption Baud rates configurable Grove compatible interface For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through Preface - Getting Started and Introduction to Grove before your using of the product. Documents Please visit wiki page for more info about this product.