dpl Arm and Wrist Pain Relief Light Therapy Wrist Wrap is intended for the relaxation of muscles and relief of muscle spasms, providing temporary relief for minor muscle and joint aches, pain and stiffness associated with arthritis and carpal tunnel, and to temporarily increase local blood circulation. dpl Wrist Wrap fits any size hand for comfortable, quick pain relief. Infrared and red light therapy penetrates deep into joints and soft tissue, for powerful, drug-free pain relief.