FMM920 General description

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FMM920 is a tracking terminal with GNSS and GSM connectivity, which is able to collect device coordinates and transfer them via GSM network to a server. This device is perfectly suitable for applications, which require the location acquirement of remote objects.

Package contents

The FMM920 device is supplied to the customer in a cardboard box containing all the equipment that is necessary for operation. The package contains:

  • Already implemented FMM920 device into case;
  • Top and bottom device cover parts;
  • 3.7 V 170 mAh rechargeable Li-ion battery;
  • and output power supply cable with a 1x5 connection pins, which is already installed into device.

Basic characteristics

GSM / GPRS / GNSS features:

  • Quectel BG95-M3, Teltonika TM2500
  • SMS (text, data);
  • Integrated GNSS receiver;
  • Up to -165 dBm GNSS receiver sensitivity.


Technology Supported bands
2G bands BG95-M3: B2/B3/B5/B8
4G bands BG95-M3: LTE-FDD (CAT M1):



B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B28/B66/B71/B85 GSM: 850/900/1800/1900

Data transfer LTE: Max. 588Kbps (DL)/Max.1119Kbps (UL)
GPRS: Max. 107Kbps (DL)/Max. 85.6Kbps (UL)

Transmit power:

Class 4 for GSM850/900: 23±2dBm

Class 1 for GSM1800/1900: 20±2dBm

Class 3 for LTE-TDD: 23±2.7dBm

Class 3 for LTE-FDD: 23±2.7dBm

Hardware features:

  • Built-in movement sensor;
  • Built-in Bluetooth 4.0;
  • Internal High Gain GNSS antenna;
  • Internal High Gain GSM antenna;
  • 128 MB Flash (422 400 Records);
  • 170 mAh Li-ion rechargeable 3.7 V battery.

Interface features:

  • Power supply: +10... +30 V;
  • 1 digital input;
  • 1 analog input;
  • 1 open collector digital output (connecting external relays, LED, buzzers etc);
  • 2 LEDs indicating device status.

Special features:

  • Fast position fix;
  • High Quality track even in high density urban canyon;
  • Small case;
  • Ready for harsh environment;
  • Easy to mount in limited access areas;
  • Firmly fasten;
  • 1 LED status indication;
  • Real time tracking;
  • Smart data acquisition based on:
    • Time;
    • Speed;
    • Angle;
    • Distance;
    • Ignition or any other I/O event;
  • Sending acquired data via GPRS;
  • GPRS and SMS I/O events;
  • Virtual odometer;
  • Configurable using Secured SMS Commands;
  • 1x micro SIM card; 1x eSIM;
  • Overvoltage protection;

Description Voltage Duration
Normal operation

+10 ... +30 V


Protection turns on, device turns off 34 V Unlimited
Maximum voltage < 70 V Unlimited
Maximum voltage impulse 90 V 5 ms

Technical features

Part name Physical specification
Navigation indication LED
Modem indication LED
Socket Soldered inner socket
USB Micro USB socket

Technical details
2 W max.
Current consumption at 12 V (Power supply 10...30 V DC)
Nominal: <28 mA
GNSS sleep: <12 mA
Deep Sleep: <3 mA
Online Deep Sleep: 8 mA
Ultra Deep Sleep: 2 mA
Battery charge current Average: 140 mA
Operating temperature (with battery) -20 ... +40 °C
Operating temperature (without battery) -40 ... +85 °C
Storage temperature (without battery) -40 ... +85 °C
Storage relative humidity 5 ... 95% (no condensation)
Device + case weight + battery weight 54 g

Technical information about internal battery

Internal back-up battery Battery voltage (V) Nominal Capacity (mAh) Power (Wh) Charge temperature (°C) Discharge temperature (°C) Storage temperature (°C)
Li-ion rechargeable battery 3.75~3.90 170 0.64 – 0.66 0 to +45 -20 to +60 -20 to +45 for 1 month
-20 to +35 for 6 months

Batteries are covered by 6 month warranty support.

Bw disposal.png Battery should not be disposed of into general household waste.
Bring damaged or worn-out batteries to your local recycling center or dispose them into a battery recycle bin commonly found in supermarkets.

Electrical characteristics

Characteristic description Value
Min. Typ. Max. Unit
Supply Voltage:
Supply Voltage
(Recommended Operating Conditions)
10 30 V
Digital Output (Open Drain grade):
Drain current (Digital Output OFF) 120 µA
Drain current
(Digital Output ON, Recommended Operating Conditions)
0.1 0.5 A
Digital Input: 300
Digital Output (Open Drain grade):
Input resistance (DIN1) 47
Input voltage
(Recommended Operating Conditions)
0 Supply voltage V
Input Voltage threshold (DIN1) 4 V
Analog Input:
Input voltage
(Recommended Operating Conditions)
0 30 V
Input resistance 150
Measurement error on 12 V 3 %
Additional error on 12 V 360 mV
Measurement error on 30 V 3 %
Additional error on 30 V 900 mV

Analog Input error margin can increase if temperature varies.

Absolute maximum ratings

Characteristic description Value
Min. Typ. Max. Unit
Supply Voltage
(Absolute Maximum Ratings)
-32 +32 V
Drain-Source clamp threshold voltage
(Absolute Maximum Ratings), (Idrain = 2 mA)
+36 V
Digital Input Voltage
(Absolute Maximum Ratings)
-32 +32 V
Analog Input Voltage
(Absolute Maximum Ratings)
-32 +32 V