The Lumen Metabolism Tracker is a handheld metabolic measurement device that uses infrared spectrophotometer sensor technology to analyze breath samples. This electronic breathalyzer, powered by a rechargeable battery, features a digital display and smartphone compatibility for easy connectivity. Manufactured by V2 in China, this unit comes with a 1-year manufacturer warranty and includes instructions for use. Perfect for health care and beauty purposes, this black device offers convenient metabolic tracking capabilities.