GPS/Glonass/Qzss Support, 72-channel GNSS Receiver, Hybrid GPS/SBAS Engine (WAAS, EGNOS, MSAS), Navigation Update Speed: Up to 18Hz, -166 dBm Navigation and -148 dBm Cold Start, Faster reaction pace with AssistantNow Autonomous , Standard NMEA-0183 Protocol and Binary Protocol Support, U-blox 8 How to use it: The Mgears brand logo is always positioned toward the sky and attached to the dashboard of the vehicle. Product size: 1.2 x 1.2 x 0.5 inch Cable length: 1.5m