Inclusion Criteria:

• Patient may have evidence of osteoarthritis (radiographic and/or by patient symptoms report) in more than one joint, however, osteoarthritis of one knee has been the patient's primary complaint and the focus of treatment.
• Radiographic evidence, within 6 months of enrollment, of osteoarthritis of the knee receiving treatment.
• Kellgren and Lawrence osteoarthritis classification grade 1, 2 or 3 (i.e., indicative of cartilage still remaining in joint).
• Average rating of pain associated with osteoarthritis of knee greater than or equal to 4 cm (on a 10 cm visual analog scale).
• Stiffness in knee(s) lasts less than 30 minutes (to demonstrate that stiffness is not from a more serious condition)
• Agrees to follow their randomized treatment plan and use the device.
• At least 18 years old.
• Signed informed consent.
• Erythrocyte Sedimentation rate greater than 40 mm/hour (Higher rates may be indicative of RA)
• Agrees to follow the randomized treatment plan and use of the stimulation device.

Exclusion Criteria:

• Hypersensitivity to electrical stimulation.
• Undergone within 3 months of enrollment, corticosteroid or viscosupplementation (i.e., hyaluronate) injections to the effected knee.
• If taking medications such as oral steroids, non-steroidal anti-inflammatories, or acetaminophen, patient has been on a stable dose for at least 3 months prior to enrollment. (The criteria should match the prior retrospective data studies.)
• If taking chondroprotective supplements (e.g., glucosamine and chondroitin sulfate), patient has been on a stable dose for at least 3 months prior of enrollment.
• Pathologic process at the knee (congenital defect or blunt trauma leading to structural defect such as torn anterior cruciate or meniscus ligaments).
• Problems due to mechanical/anatomical deformities (i.e., valgus greater than 5 degrees or varus greater than 1.5 degrees)
• Women who are, or plan to become pregnant during the clinical investigation.
• Known malignancy or cancer.
• Morbid obesity (BMI > 40).
• Serious or uncontrolled systemic illness (e.g., autoimmune disease, rheumatoid arthritis, diabetes mellitus or renal failure).
• Implanted devices such as a cardiac pacemaker or defibrillator
• Concurrent use of another electrical stimulation device for treatment of knee symptoms.
• Ongoing enrollment, or discontinued enrollment within the last 30 days, in another clinical trial for medical devices or biologic agents.
• Relationship other than medical (e.g., spouse or employee of investigator) with principal investigator(s) and their staff which may bias patient reports.
• Relationship with another person enrolled in the clinical investigation.
• Unable to complete the study per the investigational plan or unable to complete the case report forms.