UniStrong e660 e650 Geosurvey UniStrong,E660 RTK GPS Surveying

Measurement:
24 Channels, L1 C/A Code, L1/L2 Full Cycle Carrier
2 Channels SBAS support
Multi-path reduce technology

Accuracy

Code Differential GPS Positioning
Horizontal: 0.2m +- 2ppm (2DRMS)
Vertical: 0.5m +- 2ppm (2DRMS)
Static Surveying
Horizontal: 5mm +- 1ppm (2DRMS)
Vertical: 10mm +- 1ppm (2DRMS)
Real-Time Kinematic Surveying
Horizontal: 10mm +- 1ppm (2DRMS)
Vertical: 20mm +- 1ppm (2DRMS)

Hardware

Physical:
Casing: Tough and lightweight fully sealed aluminum alloy
Dimension: 182mm x 174mm x 109mm (7.2in.x 6.8in.x 4.3in.)
Weight: 2.1kg (include internal batteries, internal radio and internal GSM/GPRS module)
Temperature: Operating: -30C to +60C(-22F to +140F)
             Bluetooth: -20C to 60C(-7F to 140F)
             Storage: -40¡æ to +70C(-40F to +158F)
Water/dustproof: IP67, immersion to depth of 1 m (3.28ft)
Shock: 1.5m drop to concrete
Humidity: 95%, condensing

Electrical
Battery: Rechargeable built-in Lithium-Ion battery
Power optional: 10-25V DC external power input with over-voltage protection on 7-pin Fisher port
Operating time on internal battery: 8 hours with UHF receive, varies with temperature
Power consumption: 4W

Communication and Data Storage
2 RS-232 ports, 1 external power port, 1 USB port (USB Host), Bluetooth
Fully integrated 2W UHF radio
Fully integrated GSM/GPRS module
External UHF radio support for RTK
Data storage on 1G internal memory
Data storage on controller with 128M internal memory (1G SD card largess)
Event marker output
1-10 Hz positioning
1 pulse per second output
CMR, CMR+, RTCM, Navcom NCT input and output
NMEA-0183 output

http://www.unistrong.com/english/Product.asp?BigClassName=Discontinued

http://geotechmabna.com/catalouges/e650.pdf