Name: GT851 IP66 GPS Tracker | Advanced OEM Factory 4G+2G 90V
Brand: GreatWill

Waterproof IP66 Vehicle GPS Tracker GT851 | GreatWill

Great Will GT851 GPS Tracker is an efficient vehicle management device that supports multiple interfaces for external device expansion. Equipped with a variety of positioning modules, it enables precise vehicle tracking and management, remote engine control for vehicle safety, and compatibility with common protocols for easy system integration. It also features eight alarm systems that provide real-time feedback on vehicle abnormalities.

BDS+GPS+GLONASS+Galileo

4G+2G Full Network Access

Geo-fence Alarm

Real-time Location Tracking

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Wide Voltage, SOS Alarm — GT851

GT851 uses a waterproof design for reliable vehicle tracking in demanding environments. It supports emergency SOS functions, remote management and multiple alarms, making it suitable for stolen-vehicle recovery, light fleet management and other vehicle tracking applications.

GT851 multiple vehicle alarm functions including overspeed geofence vibration and SOS

Multiple Alarm Systems

GT851 supports overspeed, electronic fence, vibration and SOS alarms, providing multiple ways to monitor abnormal vehicle conditions and improve fleet security.

Remote Fuel and Power Cut-Off

When connected to the vehicle’s fuel and electrical systems, authorized administrators can remotely issue cut-off commands through compatible management tools to help prevent theft and unauthorized vehicle use.

GT851 remote vehicle fuel and power cut-off function

GT851 communication protocols for vehicle tracking integrations

Common Protocols

GT851 supports multiple communication methods and protocols such as TCP, SMS and MQTT, helping integrators connect the tracker with compatible vehicle-management and IoT systems.

Emergency Button (SOS Alarm)

In an emergency, the SOS button can trigger an alert and transmit current location information to configured contacts or a compatible management platform, helping operators respond quickly.

GT851 emergency SOS button and location alert

Technical Specifications

Specification	GT851
Network	4G LTE Cat-1 + 2G GSM
Working Voltage	DC 9V–90V
Dimensions	83mm × 38mm × 14mm
Location Accuracy	<2 Meters
Positioning	BDS + GPS + GLONASS
Standby Current	<38mA @ 12V
Standby Battery	80mAh / 3.7V
Working Temperature	-20°C to +70°C (-4°F to 158°F)
Waterproof Rating	IP66
Weight	46g
Interface	4-Pin / 8-Pin (Optional)
Alerts	SOS, Overspeed, Vibration, Low Power, Geo-fence

Main Features

Real-Time Tracking

Geo-Fence

DC 9–90V

Remote Cut-Off

IP66 Waterproof

GT851 GPS Tracker Applicable Scenarios

Motorcycle and Electric Vehicle Management

GT851 tracker for fleet and logistics management

Fleet Management

Car Rental and Ride-Sharing

Bulk GPS Tracking Devices Ready-to-Ship

GreatWill supplies GT851 GPS trackers for vehicle security, fleet management and distribution projects, with OEM/ODM customization available for regional and commercial requirements.

After-sales technical support and product testing are available.
Configurations can be adjusted for local networks, vehicles and project requirements.
Warranty coverage can be up to 3 years depending on the project and commercial agreement.

Sample delivery is typically about 3–5 days.
Large-volume orders generally require more than 7 days depending on quantity and customization.
Devices, platform software and SIM/IoT-card configurations are inspected before shipment.
Multiple shipping methods are supported.

High Positioning Accuracy: Multi-mode BDS + GPS + GLONASS positioning supports accuracy of less than 2 meters under suitable conditions.
Wide Compatibility: DC 9–90V input suits a broad range of cars, motorcycles and electric vehicles.
IP66 Protection: The waterproof housing supports operation in rainy and humid environments.
Rich Functions: Overspeed, geo-fence, vibration and SOS alarms plus remote fuel/power cut-off support security and fleet management.