LTE Standby Tracker with Wireless Charging

1. Global LTE Cat M1/NB2 with 2G fallback using unique antenna solution

2. Up to 1 year standby time

3. Supports wireless charging

4. Waterproof, compliant to IP67

5. Rapid and flexible installation

6. Ideal for asset monitoring and lot management

*The standby time is estimated under the condition of operating with LTE CAT M1/NB-IoT and the CSQ is greater than 15, working at a constant ambient temperature of 25°C and reporting once a day without any sensors.

The GL521MG is derived from our successful GL500MG by supporting NB2 and adding Qi wireless charging and BLE. Our customers love the battery-powered GL500MG but still wanted a rechargeable version for certain scenarios. We designed this version without impacting the waterproof and robust enclosure. Adding BLE allows connectivity to diverse wireless accessories.With internal temperature and light sensors, the product is ideal for a wide range of environmental monitoring applications such as cold chain logistics, warehouse management, cargo trucking, high-value static asset monitoring and more. The GL521MG supports several mounting alternatives which use unique clip on design to securely attach the device to any asset.



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LTE Specifications

Operating Band Cat M1/Cat NB2:
Cat M1:
LTE-FDD: B1/B2/B3/B4/B5/B8/B12/B13/
Cat NB2:
LTE-FDD: B1/B2/B3/B4/B5/B8/B12/B13/
EGPRS: 850/900/1800/1900 MHz
Data Transmission eMTC (DL) 375 Kbps
eMTC (UL) 375 Kbps
NB1(DL) 32 Kbps
NB1 (UL) 70 Kbps

EGPRS Specifications

Frequency EGPRS 850 / 900 / 1800 / 1900 MHz
Data Transmission GPRS multi-slot class 33 (33 by default)
EDGE multi-slot class 33 (33 by default)

GNSS Specifications

GNSS Type u-blox All-in-One GNSS receiver
Sensitivity Autonomous: -147 dBm
Hot start: -156 dBm
Reacquisition: -160 dBm
Tracking: -162 dBm
Position Accuracy (CEP) Autonomous: < 2.5m
TTFF (Open Sky) Cold start: 27s average
Warm start: 27s average
Hot start: 1s average

General Specifications

Dimensions 87 × 51 × 30mm
3.43’’(L) × 2.01’’(W) × 1.18’’(H)
87 × 51 × 33.5mm
3.43’’(L) × 2.01’’(W) × 1.32’’(H) (magnetic case mounting version)
Weight 150g (5.29oz)
170g (6.0oz) (magnet-mounted version)
Backup Battery Li-Polymer 3.7V/2400mAh
Standby Time Standby current: < 10 µA
1 report per day: 1 year
*The standby time is estimated under the condition of operating with LTE CAT M1/NB-IoT and the CSQ is greater than 15, working at a constant ambient temperature of 25°C and reporting once a day without any sensors.
Wireless Charger Specifications Input:5V/1A wireless charging
Limited Liability Notice:Using unapproved chargers with Queclink products may cause harm to the product and may result in battery failure, even risk of severe heat,
and burst. Queclink, its distributors, and affiliates shall not bare the burden of responsibility for any damages as described here above. By using
a third-party charger, you assume all responsibility for any risk, harm, and or injury.
Charging Method 5V/1A wireless charging
Waterproof IP67 compliant
Operating Temperature -20℃ ~ +60℃
BLE Support BLE 5.2 protocol
Internal Temperature Sensor For temperature monitoring
Accuracy: ±1℃
Internal Light Sensor For tamper detection and ambient light monitoring
Internal Motor For vibration feedback after successful operation of function button
Magnetic Mounting Case (Optional) For easy installation on metal surface


Function Button Used for power on/off and working status checking
LTE Antenna Internal only
GNSS Antenna Internal only
BLE Antenna Internal only
LED Indicators GNSS, CEL

Air Interface Protocol

Command Set @Track protocol command
Transmit Protocol TCP, UDP, SMS
Working Modes Power saving mode for long standby time
Continuous mode for emergency tracking
Scheduled Timing Report Report position and status at preset time intervals
Geo-fences Support up to 20 internal geo-fence regions
Low Power Alarm Alarm when internal battery is low
Wakeup Report Report when the device wakes up
Motion Detection Motion detection based on internal 3-axis accelerometer
Reporting Frequency Adjustment Intelligent adjustment of reporting frequency


Product-Related Files

GL521MG Flyer(EN)

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