The MESI mTABLET SPO2 is a wireless pulse oximeter system for screening, diagnosing or monitoring acute respiratory or heart illness. It is intended to measure functional oxygen saturation of haemoglobin in arterial blood by measuring differential absorption of infrared and red light by oxygenated and deoxygenated haemoglobin. This is captured and displayed as a numerical and graphical representation on MESI mTABLET UNIT.