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 ManualCautions before measurement: Be cautious about factors that may affect your results because the device is with high sensitivity sensor and avoid brushing your teeth, smoking, drinking or eating foods 30minutes before taking the test for accurate results. In order to accurately analyze and track your testing readings, 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!. Non-Invasive: This ketone Breath meter is an easy-using and self-monitoring device for individuals following on a keto life. Unlike traditional blood tests that require pricking your finger to collect blood, the ketone breath meter simply requires you to breathe into the device. Breath ketone meters also come equipped with features to track and store data over time. This allows users to monitor their progress and make adjustments to their diet and lifestyle as needed. By tracking changes in their breath ketone levels, users can gain insight into how their body responds to different foods, exercise routines, and other factors that can impact their ketone levels. Breath ketosis tester detects your breath acetone from 0 to 99 PPM and follow 6 level guidance: 0.0-1.9ppm (No ketosis), 2.0-3.9ppm (Early Stage Ketosis), 4.0-9.9ppm (Light Ketosis), 10-39ppm (Stable Fat Burning Zone), 40-59ppm (Caution-High Ketosis), 60-99ppm (Ketoacidosis) Tracking breath acetone is a better measure of what your body is actually using for fuel because acetone in our breath is an actual byproduct of fat burning, and 80 of fat that we burn leaves the body through the lungs. The ketone breath tester needs to be exhausted before your first use. To do this, turn on the Keto Breath Meter, wait for the 20 seconds countdown to be completed, and turn it off. Repeat the same procedure 1-2 times (without blowing) before you proceed to your first test. During testing, please blow for 5-6 seconds immediately once "START" showing then Ketone Breath analyzer will start analyzing your breath, the result readings will be visible for 10 seconds.