Optical HR Armband Sensor (Bluetooth | ANT+) :
- Robust | Accurate | Waterproof 
- Real-time track heart rate zones
- Connect this device to the ShokWavz open-platform via the ShokWavz HR app 
- Track, compare and monitor your progress versus your class mate. Proven to increase your effort and intensity during your workout sessions
- Dynamic real-time LED colours track your personal heart rate zones. 
- Suitable for mobile phones supporting: IOS 7.0 version above, Android 4.3 version or later
- Also compatible with your existing favorite apps: Runtastic Pro, Wahoo , Polar beat, Nike run club... and many more!
- Gamrin, Suunto and Apple watch compatible. 
- Also connects to standard push-bike computers.
- Rechargeable lithium battery, battery life 16hours (full charge).
- Band length : 35cm (L default), Option 28cm(S), 38cm (L).