The SDI Diagnostics Astra 300 Spirometer is a highly advanced, handheld pulmonary function testing device designed to provide precise respiratory metrics through an intuitive user interface. Engineered by SDI Diagnostics, this device pairs palm-sized portability with the multifunctional capabilities of a desktop system, allowing clinicians to screen, test, and report up to 40 distinct spirometry parameters across Forced Vital Capacity (FVC), Vital Capacity (VC), and Maximum Voluntary Ventilation (MVV) modalities.