At its core, the On Call brand is committed to the health of our customers. Carefully designed for accuracy and reliability, the On Call Blood Glucose Meter Family has helped millions of patients worldwide effectively manage their glucose levels. The foundation for successfully managing your diabetes starts with your meter. By choosing On Call, you can rest assured knowing your meter is more than a means to accurate results; it is the cornerstone in your diabetes management. The On Call Extra Blood Glucose Monitoring System offers user friendly features for easier diabetes management at competitive prices. The smart and powerful data management is compatible with the On Call Diabetes Management Software. Additionally, the On Call Extra is certified to be compliant with the new ISO 15197 2015.