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Feature Item Description
Chipset GSW3 SiRFStarIII LP technology
General Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 20
Accuracy Position 10 meters, 2D RMS
5 meters 2D RMS, WAAS corrected
<5meters, 2D RMS, DGPS corrected
Velocity 0.1 meters/second
Time 1 microsecond synchronized to GPS time
Datum Default WGS-84
Time to First Fix (TTFF) (Open Sky & Stationary Requirements) Reacquisition 0.1 sec., average
Hot start 1 sec., average typical TTFF
Warm start 35 sec., average typical TTFF
Cold start 42 sec., average typical TTFF
Data Log Switch mode ON/OFF; Navi & Log; Log only
Flash Memory 4MB
Recording Interval Every 15 sec.(User can configure settings)
Waypoints 60,000 points(Position, Data, Time & Altitude)
Duration 240 hrs(Continuous usage)
Dynamic Conditions Altitude 18,000 meters (60,000 feet) max
Velocity 515 meters / sec. (700 knots) max
Acceleration 4g, max
Power Main power input 5±5%(10%)V DC input
Power consumption ≈300 mW (continuous mode)
Interface Power Recharge Mini-USB connector
Bluetooth Frequency 2.4GHz ISM Band
Compliant Bluetooth Specification v 1.2
Compliant Profile Series Port Profile (SPP)
Bluetooth Operation range


Electrical Main power input 5±5%(10%)V DC input
Power consumption 0.4W@3.3VDC(Full Power)
Backup Power 1.5±10%V DC input
Operation Time 12 hours 750mAh Li-Ion battery)
Battery Electrical Battery Cell Li-ion(750mA)
Output Voltage 2.3V~4.2V ±0.025V
LED 1 (GPS) - Green
State Always on Quick blinking Slowly blinking
Description Memory full to stop 3D fixed

GPS signal acquisition

LED 2 (Bluetooth) - Blue

Quick blinking

Slowly blinking No
Description BT on, but not connected yet BT connected BT off
LED 3 (Power) - Red
State Always on Quick blinking No
Description Battery is charging Low power Battery is full charged
Environmental Characteristics Operating temperature range -10 deg.C to +50 deg.C
Storage temperature range -20 deg.C to +65 deg.C
Physical Characteristics Length 60.2mm (2.37 in)
Width 33.0mm (1.30 in)
Height 17.8mm (0.70 in)
Weight 48g (including rechargeable battery)


  • Use with the PC or Smartphone for Navigation
  • Use with the Digital Camera and the bundling software (www.locr.com) to geotag your travel spots for your own travel diary
  • Keep the tracking data for the use of various kinds of sports (Hiking, Cycling, Motor racing or Hot balloon tour)

Hardware and Software

  • Based on the high performance features of the SiRFStar III LP chipset
  • Compliant with Bluetooth v1.2, class 2
  • Serial Port Profile (SPP) supported
  • Built-in Ceramic Patch Antenna
  • Rechargeable Li-ion battery
  • Operation time: 12 hours, in continuous mode
  • Three LEDs to display the status of Bluetooth, GPS and power
  • Data logger function, provides users the tracking data including the altitude, position, date and time (NMEA Format)

Packing List

  • Color Box
  • LR 9553D main unit
  • CD-ROM with Locr software and manual
  • USB cable & Car charger
  • Warranty card
  • Neck eyelet
  • Li-Ion Battery
  • Quick Manual
  • Cold/Warm/Hot Start Time: 42/35/1 sec.
  • Reacquisition Time: 0.1 second.
  • RF Metal Shield for best performance in noisy environments.
  • Multi-path Mitigation Hardware.


  • USB-RDD for GPS communications interface
  • Protocol: NMEA-0183/SiRF Binary (Default NMEA).
  • Baud Rate: Default 38400 bps.
© 2007 Leadtek Research Inc. All rights reserved.