Oregon Scientific Smart Dynamo 2 Help Content & Faq page 47

1. Place your finger on the metal plate part of the Dynamo 2+. The smart core displays the animation below:
2. Dynamo 2+ measures and displays your heart rate on the OLED display:
3. When Dynamo 2+ is connected with your smart device, your heart rate will also show on the Ssmart Fitapp.