Inclusion Criteria:

• * Subjects must have the ability to comply with basic instructions and be able to sit still comfortably with the sensor leads attached
• * Subjects experiencing symptoms of stress, anxiety, or insomnia, who meet threshold scores on one or more self-reported inventories for the same. This includes the Insomnia Severity Index (ISI, ≥ 8), the Perceived Stress Index (PSS, ≥ 14), or the Generalized Anxiety Disorder 7-item (GAD-7, ≥ 5) scale.

Exclusion Criteria:

• * Unable, unwilling, or incompetent to provide informed consent/assent.
• * Physically unable to come to the study visits, or to sit comfortably in a chair for up to 1.5 hours.
• * Severe hearing impairment (because the subject will be using ear buds during CR).
• * Anticipated and ongoing use of alcohol or recreational drugs.
• * Weight is over the chair limit (285 pounds).
• * Currently in another active intervention research study.
• * Prior use of HIRREM, Brainwave Optimization, Cereset, or a wearable configuration of the same (B2, or B2v2).
• * Prior use of electroconvulsive therapy (ECT).
• * Prior use of transcranial magnetic stimulation (TMS), transcranial direct current stimulation (TDCS), alpha stimulation, neurofeedback, biofeedback, or deep brain stimulation (DBS) within one month before enrollment.
• * Known seizure disorder.