HOW TO USE To ensure good heart rate signal detection, moisten the plastic electrode areas on the reverse side of the strap. The connector is in a central and upright position, add the sensor in App. REPLACEABLE BATTERY CR2032 Built-in replaceable button battery, with 9-12 months working time. Easy to replace, use the coin to unscrew and replace the battery. IP67 WATERPROOF Designed IP67 waterproof, enjoy your riding on rainy days. But not suitable for swimming.
