Long Standby Time Mini Tracking Device
Product Description: 


GL520 is a GPS locator featuring long standby time. It is powered by user replaceable CR123A lithium battery pack with a built-in battery toggle switch. Configuration allows it to wake up on a preset schedule to check if it needs to shift from dormant to active status and/or send update of its current location, and then return to a dormant state. With built-in light sensor, GL520 can monitor removals of the device itself and send alerts. The integrated @Track interface protocol allows the GL520 to communicate with a customer mobile phone via SMS or a backend server via GPRS to transfer reports like GPS position. System integrators can easily incorporate the GL520 into existing tracking systems based on this full featured protocol.

  • Low power consumption, long standby time
  • Powered by two user replaceable lithium batteries (CR123A)
  • Rapid and covert installation - no wiring, no external antennas
  • Intelligent adjustment of reporting frequency
  • Quad band GSM/GPRS 850/900/1800/1900 MHz
  • Embedded @Track protocol
  • Built-in light sensor supporting removal alert
  • Internal GSM antenna
  • Internal GPS antenna
  • Optional magnetic mount case version

GSM Specifications


Quad band GSM/GPRS 850/900/1800/1900 MHz

Compliant to GSM phase 2/2+

-Class 5 (0.8W @ 900 MHz)

-Class 1 (1W @ 1800 MHz)


GPRS multi-slot class 8

GPRS mobile station class B

RMS Phase Error 5 deg
Max Out RF Power

GSM850/GSM900: 29.0±2 dBm

DCS1800/PCS1900: 30.0±2 dBm

Dynamic Input Range -15 ~ -108 dBm
Receiver Sensitivity Class Ⅱ RBER 2% (-107 dBm)
Stability Of Frequency < 2.5 ppm
Max Frequency Error ±0.1 ppm



GPS Specifications

GPS Chipset u-blox All-In-One GPS receiver

Autonomous: -147 dBm

Hot start: -156 dBm

Reacquisition: -160 dBm

Tracking: -162 dBm

Position Accuracy (CEP)

Autonomous: < 2.5m

SBAS: < 2.0m

TTFF (Open Sky)

Cold start: 27s average

Warm start: 27s average

Hot start: 1s average




GSM Antenna Internal only
GPS Antenna Internal only
Internal Indicator LED GSM, GPS
Serial Port Micro USB



General Specifications

Dimensions 90mm*39.8mm*20mm
80g (standard version)
91g (magnetic mount case version)
Backup Battery Two CR123A lithium batteries 1400 mAh
Standby Time

Standby current: < 5uA

GPS off, one report per day: 1200 days

GPS on, one report per day: 770 days

Operating Temperature -20℃ ~ +60℃
Optional Magnetic Mount Case

Use three mounting magnets to fix the device

(optional magnetic mount case version)



Air Interface Protocol

Command Set @Track protocol command
Transmit Protocol TCP, UDP, SMS
Working Mode

Frequency modulation power save mode, for long standby time

Continuous mode, for emergency tracking

Scheduled Timing Report Report position and status according to preset time schedules
Geo-fence Support up to 5 internal geo-fence regions
Low Power Alarm Alarm when internal battery is low
Wakeup Report Report when the device wakes up