Overview

FMB204 is a fully waterproof (IP67) tracker with Bluetooth connectivity, internal high-gain GNSS and GSM antennas, and a high-capacity backup battery that can keep the device online for up to 6 days in power-saving mode without external power. Its 6–30V supply range and extended 1-Wire/I-O set make it equally suited to cars, motorbikes, water transport, agriculture and refrigerated trailers.

Key Features

Fully waterproof IP67 case for outdoor and marine mounting
High-capacity 1800 mAh Li-ion backup battery — up to 6 days in power-saving mode
Keeps working and stays online after the vehicle battery is disconnected
Bluetooth 4.0 LE for wireless sensors, headsets, OBDII dongles and firmware updates
1-Wire support for up to 4 temperature sensors plus iButton/RFID driver identification
Auto Geofencing combined with Towing Detection for anti-theft
Smart Crash detection with immediate alert on impact
50 geofence zones (rectangular or circle)
Smart data acquisition by time, distance, angle, speed delta, ignition and I/O events
Deep Sleep mode under 6 mA, plus Online Deep Sleep for constant server connection
Dual-SIM support (1 × micro SIM + 1 × eSIM)
Over-speeding, excessive idling, immobilizer and GSM jamming detection
Authorized driving via 1-Wire iButton ID keys (up to 50 keys)
OTA firmware and configuration updates via GPRS (FOTA)
128 MB internal flash memory

Applications

Water transport
Motorbikes
Construction & mining
Delivery transport
Agriculture
Refrigerated transport
Trailer tracking
Insurance telematics

Specifications

GNSS

Spec	Value
Receiver	33 channel
Sensitivity	-165 dBm
Hot start	< 1 s
Warm start	< 25 s
Cold start	< 35 s
Accuracy	< 3 m
Protocol	NMEA-183
Systems	GPS, GLONASS, Galileo, BeiDou, SBAS, QZSS, DGPS, AGPS

GSM / Connectivity

Spec	Value
Bands	Quad-band 900/1800 MHz; 850/1900 MHz
GPRS	Multi-Slot Class 12 (up to 240 kbps)
GPRS mobile station	Class B
SMS	Text / data
SIM	Dual-SIM (1× micro SIM + 1× eSIM)

Bluetooth

Spec	Value
Specification	V4.0 LE
Voice calls	Supported over Bluetooth
Configuration & firmware update	Supported via Bluetooth
Peripherals	Bluetooth sensors, OBDII Bluetooth dongle

Interface & Hardware

Spec	Value
Digital inputs	3 (1 reserved for ignition status monitoring)
Analog input	1, configurable 10V or 30V range (or DIN4)
Digital outputs	2 (open-collector — relays, LEDs, buzzers)
1-Wire	iButton, RFID, temperature sensors
Accelerometer	Built-in
USB	Micro-USB port
Status LEDs	2
Storage	128 MB internal flash memory
Antennas	Internal high-gain GSM and GNSS