Scientifically studied wavelengths provide a drug-free, safe, painless. ✔ 1 × LLLT Cold Laser Therapy Device. 650nm + 808nm Targeted Pain & Inflammation Relief. 808nm Infrared Light: Penetrates deeper tissue layers to relieve muscle, joint, and nerve discomfort, including knee arthritis, cervical spondylosis, shoulder periarthritis, lumbar disc issues, and rheumatoid conditions.