Ulbotech T381

Ulbotech T381 is an OBD-II tracker with 4G support. It can use Wi-Fi to transmit telematic data, and also has a three-axis accelerometer.

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Location and tracking

Ulbotech T381 is embedded with GPS and doesn’t have support of GLONASS and alternative systems. It either doesn’t support Assisted GPS (A-GPS) technology.

With a highly sensitive GPS engine along with an integrated GPS antenna and multiple OBDII protocols supported, Ulbotech T361 can be installed in the majority of vehicles.

Mobile networks

T381 supports 4G network and WIFI function, combined 4G LTD and WIFI technology to transfer the 4G signal of mobile operator to WIFI signal to achieve WIFI hotspot function. It max supports up to 10 smart phones, PAD and laptop etc to connect with the internet via WIFI, to achieve the high-speed sharing of resources and the interconnection and mutual communication between the terminal within the local area.


Ulbotech T381 has following features:

  • OBD connectivity, simple to install, easy to use.
  • Supports all OBDII protocols and SAE J1939(250/500kbaud).
  • Internal 4G LTE modem, supports 2G/3G/4G network.
  • Build in WIFI hotspot support 802.11 b/g/n.
  • U-blox MAX-7 GPS module with A-GPS.
  • Internal WIFI, 4G LTE and 25mm*25mm active GPS antenna.
  • Internal multi-functions input and immobilizer for anti-theft.
  • Internal 3-axis accelerometer.
  • 8 types driver behavior detect.
  • Tracking by time, distance, course and status.
  • Geo-fence(Circle, Rectangular and Polygon).
  • FOTA(Firmware updating via 4G LTE or WIFI).
  • Auto APN identification.
  • Auto time zone identification.

Power supply

External power supply might be 8-32V, which makes possible to use Ulbotech T381 with all car models.

The device also has built-in backup 3.7V 180 mAh battery.

Local and remote management

Ulbotech T381 tracker can be fully controlled over GPRS. There is also a wide list of SMS commands in a human-friendly format, on which device always replies back. It supports remote APN settings configuration by SMS.

Server Integration

EU (
US (
Server port47702

General information

InstallationNot required
Special form factorOBDII Dongle


Peso55 g (1.94 oz.)
Tamanho65x61x26 mm (2.56x2.4x1.02 in)

GNSS Location

Antena interna (GNSS)Yes


Tipo de rede celularGSM Quad Band
Antena interna (Conexão)Yes
Geração de rede celular3G, 4G, 2G


ACC/Ignition inputYes

Hardware features

Capacidade da bateria180 mAh
Bateria integradaYes
Emergency buttonYes
Internal temperature sensorYes

Tracking features

Tracking modesContinuous
Location by Cell IDYes
ECO drivingYes

Events monitoring

Car crashYes

Self monitoring

GNSS signal levelYes
On request
External power source voltageYes
Internal battery levelYes

CAN/OBDII reading

CAN/OBDII parametersFuel level, fuel consumption, engine RPM, throttle position, speed, coolant temperature and other

Remote management

Remote device configurationYes (over GPRS), Yes
Forced LBS location update over GPRSYes
On request
Forced GNSS location update over SMSYes
On request



More from Ulbotech

Ulbotech T361

Ulbotech T361

Ulbotech T381

Ulbotech T381

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