iOS compatibility (iOS 8 and higher) : iPhone 4S and more recent iPod touch 5th generation and more recent iPad 3rd generation and more recent Android compatibility : (5.0 and higher) and it requires a Bluetooth Low Energy device
- Heart rate monitoring - Continuously track heart rate in workout mode to optimize training, and monitor daily and overnight heart rate to improve health over time
- Long-lasting battery - Up to 25 days battery life, plus 20 more days on power reserve mode (time & activity tracking only)
- Activity tracking - Automatically track walk, run, swim, distance & calories burned and enjoy more than 10 activities that can be recognized
- Water resistant to 50m - Accompany you to the pool and survive a downpour.
- Smartphone alerts - Receive notifications for text messages, calls, and events on the watch screen
- Sleep monitoring - Sleep cycle analysis (light and deep sleep) plus silent vibrating alarm with Smart Wake-Up which helps you wake up at the best point in your sleep cycle