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 Specs Grove - GPS Module Grove - GPS (Air530) Size 40mm x 20mm x 13mm 40mm x 20mm x 13mm Update Rate 1Hz, max 10Hz - Baud Rate 9,600 - 115,200 9600 -921600 Navigation Sensitivity -160dBm -166dBm Power Requirements 3.3/5V 3.3/5V Number of Channels 22 tracking, 66 channels - Time to first start Cold start: 13s Warm start: 1-2s Hot start: