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: 12*16*4.5mm;
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;

Dynamic :
Altitude: 50000m;
Speed: 500m/s;
Acceleration: 4G;
Operating temperature: -40°C~+85°C;
Storage temperature: -40°C~+105°C;
Indicator light: PPS lamp--the lamp does not work when it is not positioned, and the red lamp flashes after 3D positioning;

BZ-181 :
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: 18*18*4.8mm (Thinnest point), 18x18x6mm (Including thickness of terminal block);
Interface: SH1.0 4Pin;
Weight: 6.9g;
Antenna: Ultrathin Ceramic Antenna / Standard Ceramic Antenna;
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;

Dynamic :
Altitude: 50000m;
Speed: 500m/s;
Acceleration: 4G;
Operating temperature: -40°C~+85°C;
Storage temperature: -40°C~+105°C;
Indicator light: PPS lamp - the lamp does not work when it is not positioned, and the red lamp flashes after 3D positioning;

BZ-251 :
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: 25*25*5.4mm (Thinnest point), 25*25*6mm (Including thickness of terminal block);
Interface: SH1.0 6Pin;
Weight: 11.6g;
Antenna: Ultrathin Ceramic Antenna/Standard Ceramic Antenna;
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: 2D ACC 1.5m(open air);
Receiving Sensitivity: Trace-162dBm/Capture-160dBm;

Dynamic:
Altitude: 50000m;
Speed: 500m/s;
Acceleration: 4G;
Operating temperature: -40°C~+85℃;
Storage temperature: -40°C~+105°C;
Indicator light: The power on red light of the TX light flashes, indicating that there is data output
PPS lamp - the lamp does not work when it is not positioned, and the red lamp flashes after 3D positioning