Specification		Details
Brand		BZGNSS
Model		BZ-251
Type		GPS Module with Compass
GPS Receiver Type		GPS, GLONASS, Galileo, QZSS, SBAS
Frequency		L1 band (1575.42 MHz)
Channels		72-channel
Positioning Accuracy		Horizontal: <2.5m CEP
Velocity Accuracy		<0.1 m s
Timing Accuracy		±30 ns
Acquisition Time		Cold Start: <30 s
		Warm Start: <5 s
		Hot Start: <1 s
Sensitivity		Tracking: -167 dBm
		Cold Start: -148 dBm
		Hot Start: -156 dBm
Update Rate		Up to 10 Hz
Power Supply Voltage		3.3V to 5V
Power Consumption		<30 mA (continuous tracking mode)
Interfaces		UART, I2C, SPI
Baud Rate		Configurable, default 9600 bps
Antenna		Integrated ceramic patch antenna, 25x25mm
Compass		HMC5883L 3-axis magnetometer
Compass Resolution		12-bit ADC, 0.73 mG LSB
Compass Range		±8 gauss
Compass Accuracy		±1° to ±2°
Compass Interface		I2C
Compass Data Rate		Up to 160 Hz
Dimensions		25mm x 25mm x 8mm
Weight		15g
Operating Temperature		-40°C to +85°C
Storage Temperature		-40°C to +85°C
Humidity		5% to 95% non-condensing
Mounting Type		Surface mount (SMT)
LED Indicator		Power and status LEDs
Certifications		CE, FCC, RoHS
Firmware Upgrades		Supported via UART interface
Additional Features		– Built-in LNA and SAW filter
		– Multi-path mitigation
		– Support for A-GPS
		– Support for DGPS and RTK modes
		– Combined GPS and compass for enhanced navigation

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