Navigator II Continuous Glucose Monitor Home Use Study

Inclusion Criteria: The subject must: * Have type 1 or 2 diabetes for at least 2 years prior to enrollment. * Require insulin therapy administered through an insulin pump or multiple daily injections (MDI) for at least 6 months prior to enrollment. * Be at least 18 years of age. * Be able to read and understand English. * In the investigator's opinion, be able to follow the instructions provided to him/her by the study site and perform all study tasks as specified by the protocol. * Be available for all study visits. * Be willing to provide written signed and dated informed consent. Exclusion Criteria: The subject must not: * Be pregnant or likely to become pregnant during the study duration. * Have skin abnormalities at the insertion sites. * Have known allergy to medical grade adhesive or skin disinfectant. * Be using a continuous glucose monitor currently or within the past 6 months * Have a concomitant medical condition which, in the opinion of the investigator, could interfere with the study or present a risk to the safety or welfare of the subject. * Be participating in another clinical trial.