Zone 1 (50–60% HRmax): Recovery pace, very easy effort.
Zone 2 (60–70% HRmax): Aerobic base-building, ideal for long runs and endurance.
Zone 3 (70–80% HRmax): Moderate effort, good for steady-state runs.
Zone 4 (80–90% HRmax): Threshold pace, pushing your limits but sustainable for shorter efforts.
Zone 5 (90–100% HRmax): Maximum effort, used for short sprints or interval training.
Displays
Camera (video)
Heart rate (pulse sensor)
Speed (accelerometer)
Button + 7-segment display and speaker user interface
Calculates optimal speed based on heart rate
Input height, age, and other personal data