Watch 3 series was known for its advanced features and capabilities.

Key features of the Samsung Galaxy Watch 3 45mm 4G may include:

1. 4G Connectivity: The "4G" in the name suggests that the watch supports cellular connectivity, allowing you to make calls, send messages, and use data services without relying on a connected smartphone.

2. Health and Fitness Tracking: Samsung's smartwatches typically come with a range of health and fitness tracking features. This may include heart rate monitoring, sleep tracking, blood oxygen monitoring, and various exercise modes.

3. Design and Display: The Galaxy Watch 3 series was known for its premium design and a high-quality display. The 45mm size suggests a larger watch face, providing ample space for information display.

4. Rotating Bezel: Samsung Galaxy watches often feature a rotating bezel for easy navigation through menus and apps, providing a convenient and intuitive user interface.

5. Smartphone Integration: Seamless integration with Samsung smartphones and compatibility with both Android and iOS devices. This allows you to receive notifications, control music, and use various apps directly from the watch.

6. Water Resistance: Samsung watches typically come with water resistance, making them suitable for swimming and other water-related activities.

7. App Ecosystem: Access to a variety of third-party apps through Samsung's app store, expanding the functionality of the smartwatch.