General features:
  GPS technology: SiRF GPS chipset
                  Frequency: L1,1575.42MHz
                  C/A Code: 1.023MHZ chip rate             
                  Dimensions: 25.4(W) x 25.4(D) x 7(H) (mm)

Detailed Introduce：
                   General 
                   Frequency: L1,1575.42MHz 
                   C/A Code: 1.023MHZ chip rate 
                   Channels: 20 
                   TIMEMARK-1PPS Pulse 
                   Level CMOS 3V Pulse duration 1 microsecond. 
                   Time reference At the pulse positive edge. 
                   Measurements Aligned to GPS second, 1 microsecond. 
                   Datum 
                   Default WGS-84  
                   Other Support different datum by request  
                   Physical Characteristics 
                   Active Size: 25.4(W) x 25.4(D) x 7(H) (mm) 
                   Weight: 2 g 
                   Interface connector 6-pin straight male header, 1.25 mm pitch  
                   Environmental Characteristics 
                   Operating temperature range : -10 C to +60 C
                   Storage temperature range: -20 C to +85 C
                   Power : 
                   Input power 3.3V - 5.5VDC 
                   Input current: Less than 80 mA (without antenna) 
                   Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours discharge. 
                   Accuracy (Open Sky) 
                   Position ㄩ 10 meters, 2D RMS . 
                   7 meters 2D RMS, WAAS corrected  
                   1-5 meters, DGPS corrected  
                   Altitude < 35m Vertical in term of 95%  
                   Velocity 0.1 meters/second  
                   Time 1 microsecond synchronized to GPS time 
                   Acquisition Rate (Open sky, stationary requirements) 
                   Reacquisition: 0.1 sec., average. 
                   Hot start: 1 sec., average. 
                   Warm start: 38 sec., average. 
                   Cold start: 42 sec., average. 
                   Interface 
                   Antenna connector type: MMCX, output 2.8 VDC. (optional output VCC_IN). 
                   Minimum signal tracking: -159 dBm. 
                   Two full duplex serial communication, CMOS interface, with user selectable baud
                   rate (4800-Default, 9600, 19200, 38400) 
                   NMEA 0183 Version 2.2 ASCII output (GGA, GSA, GSV, RMC (VTG , GLL
                   and ZDA for optional)) .  SiRF binary-position, velocity, altitude, status output