About the brand: Merging natural frequency, technology and wellbeing. Known as the "Feel Good Watch" Philip Stein watches utilize Natural Frequency Technology to help balance the body's energy flow and promote an improved sense of well-being. Quartz movement Black rubber strap Thorn buckle clasp Stainless steel bezel and case Mineral crystal Design details: Inside of each Philip Stein watch is a metal disc that functions as a fine-tuned antenna, channeling nature's beneficial frequencies which encourage the human body's optimum performance, including more energy, focus, and overall well-being. Case: 36mm in diameter Manufacturer's limited warranty