Specification: Brand name: Matek Item name: GPS amp; compass module M8Q-5883 Dimensions: L20 x W20 x H10 mm Weight: 7 gram Input voltage range: 4~6V Uart (Tx,Rx) interface for GPS SAM-M8Q I2C (DA,CL) interface for Compass QMC5883L Battery for HOT module start Power LED(Red) amp; Time pulse LED(Blue) Supported by INAV/Betaflight/Ardupilot, ect. Features: -72-channel M8 engine GPS L1C/A, SBAS L1C/A, QZSS L1C/A, QZSS L1 SAIF, GLONASS L1OF, Galileo E1B/C -On-board Ultra low noise 3.3V voltage regulator and RF filter for noise blocking -Features an additional front-end LNA for optimized performance and a front-end SAW filter for increased jamming immunity -Build-in embedded GNSS patch antenna, low power consumption -The 15 x 15 mm patch antenna provides the best compromise between the performance of a Right Hand Circular Polarized (RHCP) antenna and a small size to be integrated in any design. -Magnetic sensor QMC5883L integrated -Max navigation update rate Single GNSS up to 18 Hz 2 Concurrent GNSS(GPS amp; GLONASS) up to 10 Hz -Horizontal position accuracy(GPS amp; GLONASS) 2.5 m CEP -Velocity accuracy 0.05m/s -Cold start 26 s Aided cold starts: 2 s Hot start 1 s -Sensitivity Tracking amp; Navigation: #39; #39; #34;165 dBm Reacquisition: #39; #39; #34;158 dBm Cold start: #39; #39; #34;146 dBm Hot start: #39; #39; #34;155 dBm Tips: -GPS, GLONASS, SBAS, QZSS are enabled by default -Blue PPS LED blinking(1Hz) means 3D fixed -update rate 1Hz amp; baudrate 9600 default -Baud 9600~115200 supported by INAV/BF/Ardupilot -Compass Alignment(Arrow forward): INAV/BF: CW 270 Flip Ardupilot/Mission Planner: Rotation None -BF doesn #39; #39; #39;t support GPS position hold and RTH, GPS Rescue mode is supported by BF3.5 or last. -No need compass for Fixed wings with INAV firmware -The scratches on ceramic antenna are the result of tuning the antenna by ublox. u-center Windows : https://www.u-blox.com/en/product/u-center-windows Package included: 1x M8Q-5883 module 1x SH1.0-6P 20cm silicon wire 1x Transparent PVC Heat-shrink tube