Cautions Before Measurement: Be cautious about factors may affect your results because the device is with high sensitivity sensor and avoid brushing teeth, smoking, drinking or eating 30minutes before taking test for accurate results. In order to accurately analyze and track your ketosis, we strongly recommend testing your ketone levels under the same conditions each time right after waking up in the morning before consuming anything in fasting status! Using Steps: 1.Powered by 2x AAA alkaline batteries (not included) 2.Press the power button for 3 seconds to start device 3.Warm-up and exhaust residuals 4.Blow for 5-6 seconds right after warm-up 5.Ketone meter analyzes and reading shows 6.No more painful finger pricks or messy urine strips Breath Acetone Concentration Readings Instructions (PPM): 0 ~ 1.9 PPM: You are not in ketosis or just right before ketosis. 2.0 ~ 3.9 PPM: You are at very early stage of ketosis. 4.0 ~ 9.9 PPM: You are in a light status of ketosis. The body fat is burning at a low pace. 10 ~ 39 PPM: You are in the optimum level of ketosis. This is the stable fat burning zone, the process of fat being used by the body as the main source of energy. 40 ~ 59 PPM: Be Caution! You are approaching too much ketosis level. Adjust your level to under 40ppm. 60 ~ 99 PPM: Danger! You are in too high level of ketosis. Ketoacidosis. Contents of Package: 1x ketone breath analyzer device 10x mouthpieces 1x User’s Manual