Technical specification of V*0
      Signal trackingGPS: L1 C/A, L2E, L2C, L5     GLONASS: L1 C/A, L1 P, L2 C/A   (restricted to GLONASS M) and L2 P
      GALILEO:upgrade      SBAS:WAAS,MSAS,EGNOS
      Module technology：PCC Maxwell 6 advanced custom measurement GNSS technology 
                        Extremely low-noise GNSS carrier phase measurements
                        Accuracy in the range of 0.**1m at 1 Hz bandwidth Mature low-elevation tracking techniques
      Initializing time：＜*0 s
      Initializing reliability：>*9.9%
      Positioning output：1Hz, 2 Hz, 5 Hz, *0 Hz, *0Hz and *0 Hz positioning output(*0Hz default)
      Differential supported：CMR, CMR+, RTCM 2.1, 2.2, 2.3, 3.0, 3.1
      Output format：ASCII:NMEA****3 and binary: Trimble GSOF

      Positioning accuracy：Receiver accuracy       
       Static, rapid static accuracy :Horizontal: ±(2.5*1×***6D)mm      Vertical: ±(5*1×***6D)mm
       RTK positioning accuracy: Horizontal: ±(*0*1×***6D)mm     Vertical: ±(*0*1×***6D)mm

      Built-in communication：
      Fixed GPRS module
      Optional CDMA/3G network communication module
      Optional CDMA communication services, WCDMA 3G communication function supported
      Dual-mode network communication available,such as, GPRS+GPRS, GPRS+CDMA, GPRS*3G
      Optional GM**6V built-in transmitter-receiver, V8 compatible
      Emission power adjustable among 0.1W, 1W and 2W
      Radio frequency bands **0MHz~**0MHz,offering **0 channels
      Highest wireless communication transfer rate at *9.2Kbps
      Optional GM**6PV built-in transmitter-receiver, imported radios compatible
      Comply with RTK data transceivers of Trimble, Leica and other brands
      Emission power adjustable among 0.1W, 1W and 2W
      Radio frequency bands: **0MHz~**0MHz,offering *2channels, and users can customize the frequency table
      Highest wireless communication transfer rate at *9.2Kbps

      External radio:
      Optional V8 radio
      Radio frequency bands **0MHz~**0MHz,with the highest wireless communication transfer rate at *9.2Kbps,  offering **0 channels,
      Optional Lc**0 radio Emission power: 5W Radio frequency bands **0MHz~**0MHz,offering *4 channels
      Optional UH****0 booster station
      No external cable or battery is needed, so you can put it where you want within 5 kilometers away from the base station.
      It can both directly transmit and forward in same-frequency or pilot-frequency
      It has **6 UHF channels, and supports custom channels.
      5W/*0W/*0W/*0W adjustable

      Interface:Two RS***2 serial ports
      Two external DC power port(reusable)
      One Bluetooth wireless communications port
      One USB port supporting data download
      One GSM/CDMA SIM card compartment

      Panel Key-Press and Indicator Lamps:3 panel key-presses, 1 power key-press, 2 function key-presses,
      3 indicator lamps: one monochromatic lamp for satellites, one dual-color lamp for communications and one dual-color lamp for power
      Physical Specifications:Memory *4M  Main unit power: 2.5W  Power : ***6 V DC
      Battery system: Internal dual compartment Lithium battery system, each battery capability ***0mAh working up to *0 hours for GPRS mobile
      station Size: φ*9.5cm×*0.4cm Weight: ***0g(with 2 batteries inserted)
      Environmental characteristicsTwo meters water-proof, anti*3m natural drop,
      completely dust-proof, IP*7 grade Operating temperature: **5℃~*5℃, Storage
      temperature: **5℃~*5℃