Sigma Onyx Pro

• Digital coded transmission
• 4 heart rate functions
• Time functions, including countdown and alarm
• Training mode based on max HR or individual anaerobic threshold (IAT)
• Pre-programmed endurance training modules
• Programmable endurance training module
• 2 pre-programmed interval training modules (time or pulse driven)
• 1 programmable interval training module
• Training mode with 3 adjustable HR zones
• Lap counter (50 laps)
• Total values per week, per month, and since reset
• Marathon competition counter
• Memory for 7 training sessions

• Equipment
• Extreme Sports