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BZ-121 จะมีแค่ GPS เพียงอย่างเดียว
BZ-251 จะมีเข็มทิศหรือ Compass มาด้วย
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BZ-121
Chip:u-blox M10050(Ten Generation Chip)
Pattern: GPS,GLONASS,BDS,GALILEO,SBAS,QZSS(Default GPS+GLONASS+BDS joint positioning)
FLASH:Supported
Frequency:GPS L1,GLONASS L1,BDS L1,GALILEO L1,SBAS L1,QZSS L1
Power:5V
Size:12x16x4.5mm
Interface:PCB Pad
Weight:2.2g
Antenna:Ultrathin Ceramic Antenna (oil spraying process, prevent scratching and oxidation)
Receiving channels:72 search channels
Baud rate:115200dps
Output Protocol:NMEA / UBLOX (Dual protocol)
Output Frequency:1Hz-10Hz. Default 10Hz
Speed accuracy:0.05m/s
Horizontal Positioning Accuracy: 2D ACC 1.5m(open air)
Receiving Sensitivity:Trace-162dBm / Capture -160dBm

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BZ-251+Compass
Chip: M10 (ten generation chip)
Frequency: GPSL1,GLONASS L1,BDS B1,GALILEO E1,SBASL1,QZSSL1
Power:5V
Size:25mmx25mmx8mm
Antenna: ceramic antenna (oil spraying process, prevent scratching and oxidation)
Receiving channels: 72 search channels
Compass:QMC5883
Baud rate:115200dps
Output protocol: NMEA/UBLOX (dual protocol)
Output frequency: 1Hz-10Hz. Default 10Hz
Speed accuracy:0.05m/s
Horizontal positioning accuracy: 2DACC1.5m(open air)
Receiving sensitivity:Trace-162dBm
Capture -160dBm
Dynamic characteristics:
Altitude:50000m
Speed:500m/s
Acceleration:4G
Operating temperature:-40°C-+85C
Storage temperature:-40°C-+105°C