OMRON Max Power Relief TENS Unit Muscle Stimulator - Massage Therapy for Lower Back, Arm, Foot, Shoulder, and Arthritis Pain - Drug-Free Pain Relief

OMRON Pocket Pain Pro TENS Unit Muscle Stimulator - Massage Therapy for Lower Back, Arm, Foot, Shoulder, and Arthritis - Drug-Free Pain Relief

AccuRelief TENS Unit Pain Relief System - Muscle Stimulator For Pain Relief From Back Pain, Neck Pain, And Other Body Pains - Clinical Strength OTC Approved

This is the correct TENS unit placement for upper back pain

How to Place Electrodes for a Tens Unit

How To Set Up Tens Unit (Tens Machine) For Pain Relief