1. First, open Xiaomi Sports on your phone and click My Options on the lower right, as shown in the picture below.

2. Then under My Devices, you can see which generation the bracelet is, as shown in the picture below.

3. Or remove the rice grains of the bracelet from the strap, as shown in the picture below.

4. Through the model information on the side, you can also determine which generation the bracelet is.