Information   CHC now launches the new generation GPS/GNSS receiver­­­­­----X91, a smaller, lighter with the most advanced techniques.  X91 will indeed become the valuable assistance for your field work. GPS/GNSS receiver, antenna, UHF receive radio, GSM/GPRS Module, Bluetooth® and power source are integrated into one single compact unit that makes work more integrative and more achievable. 　Features Smaller and lighter The size of X91 is 80mm?180mm, and the weight is 1.25KG (include battery), largely reduce the pressure of your work. Built in internal GSM/GPRS modem With the built-in GSM/GPRS modem, X91 is able to be compatible with all kinds of popular network RTK system, including Leica, Trimble, Topcon and CHC network RTK system. RTK with Radio Datalink Besides the CHC DL3 datalink, the new CHC X91 can be used with PDL datalink together. That means with the X91 rover, you are able to use most major brands of base stations. Without purchasing a new base station, you could benefit  a lot. 　Technical Parameters   RTK Horizontal:    +(10mm+1ppm)RMS Vertical:  +(20mm+1ppm)RMS Initializing Time:   10S Initialization Reliability:   Typical>99.9% Static Horizontal:   +(3mm+1ppm)RMS Vertical:   +(5mm+1ppm)RMS Data Format RTCM 2.1, RTCM 2.3, RTCM 3.0, CMR, RTCA, Input and Output  NMEA 0183 outputs, GSOF outputs Physical Reference Size(HX D) :  80mmX 180mm Weight:  1.25kg (Battery Included) Electronic Reference Power Consumption:   2.6W Battery Volume:   2400mAh Battery Life:   9 Hours (Static) Battery Life:   1000 recharging time External Power:   9-18 VDC Environment Working Temperature:   -30- +65 Storage Temperature:   -40 -+75 Humidity:   100% condensation Waterproof:   IPX7, protected from temporary immersion to depth of 1 meter, floating. Shock and Vibration:   Survive from 2 meters drop onto concrete Characteristics Tracking:  L1, L2, SBAS and Glonass(Optional) Channel:  Parallel 54 Channels Buttons and Display:  2 buttons/4 LED lights I/O:  RS232, High-speed USB,  Bluetooth Datalink Power (UHF): 1W-20W Adjustable Band Width: 450-470 MHz