LTE Cat M1/NB1 Fleet Tracking Devices
Product Description: 

The GV350 series (LTE) includes three models of GNSS tracking devices with multiple interfaces including two RS232 serial ports and a 1-wire interface, etc. The series supports LTE Cat M1/NB1 network on multiple bands for operation globally with a fallback to EGPRS.


  • Wide Operating Voltage Range 8V to 32V DC
  • Multiple I/Os for Monitoring and Control
  • 1-wire Interface Supports Temperature Sensor
  • GARMIN FMI/Multiple Sensors
  • Two RS232 Serial Ports for External Accessories
  • Internal 3-axis Accelerometer for Motion Detection
  • Driving Behavior Monitoring and Incident Notification
  • Internal GNSS Antenna and Optional External GNSS Antenna

GV350 LTE Product Series

Region Sub Model Certificate 
North America GV350MA FCC/Verizon
North America GV350MG_S FCC/Sprint





GSM Specifications

Frequency 850/900/1800/1900 MHz
Data Transmission

GPRS multi-slot class 33 (33 by default)

EDGE multi-slot class 33 (33 by default)

LTE Specifications

Operating Band

Cat M1/Cat NB1:

LTE FDD: B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25*/B28

LTE-TDD: B39(for Cat.M1only)

Data Transmission

eMTC (DL) 375 Kbps

eMTC (UL) 375 Kbps

NB1 (DL) 32 Kbps

NB1 (UL) 70 Kbps

*B25 is supported on GL300MG_S

GNSS Specifications


u-blox All-in-One GNSS receiver


Cold start: -145 dBm

Tracking: -161 dBm

Position Accuracy (CEP50) Autonomous: < 2.5m
TTFF (Open Sky)
Cold start: 30s average
Hot start: 1s average


Digital Inputs

1 positive trigger input for ignition detection

3 negative trigger inputs for normal use

Digital Output

1 digital output, open drain, 150 mA max drive current

Latched Digital Output

1 digital output with internal latch circuit, open drain, 150 mA max drive current

Configurable Input/Output

1 special I/O can be configured as a 0V-32V analogue input or an open drain digital output with 150 mA max drive current

Serial Ports

2 RS232 serial ports on 16 pin Molex type connector, for external devices

CAN Bus Interface CAN 2.0A/B, SAE J1939
1-wire Interface

Support 1-wire temperature sensor (maximum 8 channels)

Cellular Antenna Internal only
GNSS Antenna

Internal patch antenna and optional external antenna (SMA type connector)

LED Indicators


Mini USB Interface

Used for upgrading and debugging

General Specifications


80mm(L) x 48mm(W) x 25mm(H)



Backup Battery

Li-Polymer, 250 mAh

Operating Voltage 8V to 32V DC
Operating Temperature
-30℃ ~ +80℃ 
-40℃ ~ +85℃  for storage

Air Interface Protocol

Transmit Protocol TCP, UDP, SMS
Scheduled Report

Report position and status based on preset time intervals, distance, mileage or a combination of these settings


Geo-fence alarm, support up to 20 circular and 20 polygon geo-fence regions

Power On Report

Report when the device is powered on

Tow Alarm

Based on internal 3-axis accelerometer

Driving Behavior Monitoring

Aggressive driving behavior detection, including harsh braking,  acceleration, etc.

Crash Detection

Accident data collection for reconstruction and analysis

Special Alarm

Special alarm based on digital inputs

Remote Control

OTA control of digital outputs