There are many types of wrist bands that can be used to house the components for the testing.  Most are simply comfort and visual aspects of that development.

The sensors are very important along with the life of the battery and then the communications facility built into the wrist band.

We are providing the following sensor and reporting of controlled measurements using Bluetooth, WiFi, cell phone data, and tethered connection.  Currently we are assessing a variety of sensors that will be redundant in the wrist band in order to maintain calibration.  Some of those sensors provide for: 1) EKG; 2) Blood pressure; 3) Oxygen levels; 4) Body temperature; 5) Respiration and Pulse; 6) Humidity in the surrounding area of patient; 7) Room temperature; 8) Ambient Noise Levels; 9) Ambient room lighting; 10)Glucose levels within a specific range; 11) minimal GPS capabilities; 12) Specialized testing for levels of iron and a variety of elements within the blood stream that can be identified using sound acoustics and/or frequencies; 13) an accelerometer for measurements of movement and positioning of the body.
It has been our plan to develop a variety of wrist bands with the ability to upgrade or downgrade the sensors in the field with a simple chip to insert into the wrist band.   This would provide for a low usage and possibly a perishable version of the wrist band that could be distributed into the market at a very low cost for distribution and would then provide for a subscription service for the data to be retrieved back to our central data analysis and processing service center.  
On the client side of this proposition we are developing a Microsoft CRM interface to provide individual patient management services to a physician monitor patients with and can actually schedule specific test to be performed by the wrist band according to a proprietary communications protocol.  We will have a functional interactive application program for secure connection to the data received and processed based upon the physician’s prescription and other required protocols, ready sometime late 2021.
We have a licensing arrangement for a variety of intellectual properties to assist in the analysis and reporting to physicians for their patient’s test and measurements.