The DAVID Delight Pro is our choice for achieving peak mental performance and physical optimization. This convenient, portable hand-held device offers a non-pharmaceutical approach to using Audio-Visual Entrainment (AVE) and Cranio-Electro Stimulation (CES) and is supported by research in the areas of stress reduction, insomnia, reduced worry, SAD, reduced risk of falling in seniors, improvement in concentration and memory in college students, optimized academic, sports and business performance.