Lumen weight loss metabolism tracker device - keto

Lumen Metabolism Tracker Lumen is a handheld device that analyzes your breath to provide insight into your metabolic state. It uses a range of 5 levels to indicate whether your body is mainly burning fats, carbs, or combining the two for energy. The Lumen Breath Analyzer measures the carbon dioxide (CO2) in your breath through a sensor and flow meter, based on the Respiratory Exchange Ratio (RER) metric. It uses a range of 5 levels to indicate the type of fuel your body is burning. Also, the percentage of carbs and fat burned. This percentage is based on your actual breath (CO2) data. Lumen is simple, easy to use, and non-invasive. It tells you how your body is handling your low-carb diet and the best way to consume carbs for your metabolism and fat-burning. Pre-owned. Used maybe once or twice if that. I can't remember. Sorry, I don't have the charger cable. Requires a subscription and app download.