How does apple watch distinguish between the first generation and the second generation?

Apple Watch's new system, Watch OS 2, is better than OS 1, adding many new functions:

1, adding three dials: time-lapse photography dial, photo album dial and photo dial.

(1) Time-lapse photography dial: There are many time-lapse photography in Maikehu, new york, Hongkong, London, Paris, Shanghai and other places, which changes 24 hours in the morning and evening;

(2) Album dial: Select an album, and every time you touch or lift your wrist to activate the screen, multiple pictures will be changed in the album;

(3) Photo dial: You can customize a photo as the wallpaper of the dial.

2, practical, functional bits such as modules on the dial can be displayed in color.

3, the dial function can add the lunar calendar (this is rarely mentioned in the article).

4. Adjust the order of dial function bits, and increase the optional colors of dial and hands.

5. Support native App (which needs third-party development) and can run independently on Apple Watch.

6. Some third-party apps will provide dial function support, that is, display app information on the dial.

7. When charging, if the dial is placed horizontally, you can turn on the bedside clock function (that is, the digital clock is displayed horizontally).

8. The number of buddy dials can be increased, up to 20 dials (dial grouping) and ***240 contacts.

9. Connecting to the iPhone through WiFi can display a special connection sign-Xiaoyun, instead of a watch connected to WiFi independently.

10, Siri function is enhanced.