Functions Measures heart rate continuously during exercise or normal life Sends heart rate readings wirelessly Purposes To improve efficiency of training To avoid injuries To prevent potential health problems Features Convenience in wearing : Chest belt free Motion artifact free Easy to use Wireless communication Specification Measurement Method : PPG (Photo PlethymoGraphy) Measurement site : Finger (or Wrist) Dimension and weight Size : 56 x 44 x 12 mm