A gps car tracker is a device that uses Global Positioning System (GPS) technology to determine the precise location of a vehicle. It typically consists of a gps receiver to capture location data and a communication module to transmit this information to a central server or user's device.

1. Real-time Tracking: Provides live and continuous updates on the vehicle's location.

2. Geo-Fencing: Allows users to set virtual boundaries, triggering alerts if the vehicle enters or exits a defined area.

3. History Playback: Enables users to review the historical route and locations visited by the vehicle.

4. Speed Monitoring: Tracks and alerts users if the vehicle exceeds pre-set speed limits.

5. Vehicle Health Monitoring: Some trackers can monitor aspects like engine status, fuel level, and battery voltage.

6. Anti-theft Features: Includes features like engine immobilisation or remote shutdown in case of unauthorised use.

7. Mobile App Integration: Many trackers come with companion mobile apps for convenient monitoring on smartphones or tablets.

8. Tow away alerts: Get notified within minutes if a thief tows your car away

9. Tamper Alerts: Notifies the user if someone tries to tamper with or remove the tracker.

10. Subscription Plans: Typically requires a service plan for data communication and tracking services.

Installation involves connecting the tracker to the vehicle's power source and ensuring a clear view of the sky for optimal GPS reception.

Keep in mind that usage and features can vary between different gps car tracker models and brands.