$GTCH GBT/Tokenize’s blood pressure solution will comprise a complete integrated optical sensor module, and an embedded microcontroller. A sensing firmware algorithm will provide the operation and control of the entire system. Such method is called photoplethysmography (PPG) and its goal is to detect blood volume changes in the microvascular tissues. qTerm users will be able to measure blood pressure simply by placing their finger on the device while resting, at any time and anywhere.