Feasibility Trial of the Bios Device for Continuous Glucose Monitoring

Inclusion Criteria: 1. Subject is at least 18 years of age; 2. Subject has had a diagnosis of diabetes mellitus either Type I or Type II; 3. For insulin-using subjects only: subject will not inject insulin or wear an insulin pump insertion set within a 10 cm distance of any Bios device; 4. Subject able to wear multiple CGM devices simultaneously; 5. Subject is either a patient diagnosed with Type I diabetes mellitus currently wearing a Dexcom CGM device or a patient diagnosed with Type II diabetes mellitus who will agree to use a Dexcom CGM device during participation in the study. There are no restrictions on the model of the Dexcom CGM device. 6. Subject agrees to provide a log of medications (prescription and over-the-counter) and dietary supplements (e.g., vitamins) taken during the study period, including dosage; 7. Subject has a smart device that complies with the requirements listed in Attachment 1 of this protocol and is willing to download and run the GraphWear Patient application on their device; 8. Subject is able to read and understand the Informed Consent Form and has voluntarily provided written informed consent; 9. In the Principal Investigator's opinion, subject is able to be compliant with provisions laid out in this protocol. Exclusion Criteria: 1. Subjects with any physical or behavioral disorder, which, in the opinion of the Principal Investigator, may interfere with the use of the device or compliance with the study protocol; 2. Subject has any of the following: * a skin condition that precludes wearing of the device; * a known allergy that precludes wearing of the device; * tattoos or other skin alterations that may interfere with device placement and/or operation; 3. History of substance abuse within 6 months of study start; 4. Use of any illicit drugs during the duration of the study period; 5. Marijuana use during the duration of the study period; 6. If female, subject is pregnant or nursing; 7. Subject is on active dialysis; 8. Subjects whom the Principal Investigator believes may not be an appropriate candidate for this device.