It's a Heart Rate Monitor Kit with AD8232 ECG sensor module. It is used to measure the electrical activity of the heart. This electrical activity can be chart as an ECG or Electrocardiogram and output as an analog reading. ECGs can be extremely noisy, the AD8232 acts as an op-amp to help obtain a clear signal from the PR and QT Intervals easily.  The ECG Module AD8232 Heart ECG Monitoring Sensor Module Kit for Arduino is designed to extract, amplify, and filter small bio-potential signals in the presence of noisy conditions; such as those created by motion or remote electrode placement. Applications: Fitness and Exercise Heart Rate Monitoring, Portable ECG, Remote Health Care, Gaming Peripherals, Biological signal acquisition. 

Specifications :

Package Include :

1 x  Heart Rate Monitor Kit with AD8232 ECG sensor module