GPS modules come with a range of functions and features that enable them to provide accurate location data and integrate with other systems. Here are some common features:

1. Real-Time Location Tracking: Provides continuous updates on the geographic location of the device.

2. High Accuracy: Offers precise positioning, often within a few meters, depending on the module and conditions.

3. Fast Time to First Fix (TTFF): Quickly acquires satellite signals to provide location data shortly after powering on.

4. Multiple Satellite System Compatibility: Supports various satellite systems, such as GPS, GLONASS, Galileo, and BeiDou for enhanced accuracy and reliability.

5. Low Power Consumption: Designed to operate efficiently, making them suitable for battery-powered applications.

6. Built-In Antenna: Many modules come with integrated antennas for ease of installation, although external antennas may also be supported for improved reception.

7. Data Logging: Some modules can store location data for later retrieval, useful for tracking journeys over time.

8. Geofencing Capability: Allows users to set virtual boundaries and receive alerts when the device enters or exits these areas.

9. Speed and Direction Tracking: Provides information on the speed and direction of movement, useful for various applications.

10. Compact Size: Typically small and lightweight, making them easy to integrate into various devices and systems.

11. Serial Communication: Supports common communication protocols (like UART) for easy integration with microcontrollers and other devices.

12. Multi-Channel Reception: Can track multiple satellites simultaneously, improving location accuracy and reliability in challenging environments.