Important Tips to Get Accurate Ketones Readings! The monitor needs to be exhausted before your first use since it may have residuals from production to warehouse; if you want to test another person consequently after your testing, please also kindly exhaust your previous residuals. To do this, turn on the Keto Breath Meter, wait for the 30 seconds countdown finish, 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 the ketone meter will start analyzing your breath, the readings will be visible for 10 seconds. 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. Package: 1x ketone breath analyzer device 10x mouthpieces 1x User’s Manual 1x carrying bagKetone breath meter is guaranteed with 12 months, if you are not satisfied for any reason, we offer money back for 30 days after purchase, or we will replace you with brand new product at no charge, if you meet any problem during operation with our keto test devices, please contact our service team, and please check to make sure that all parts and components are included in the package. If any part is missing, please contact the retailer. Breath ketone meter 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. This ketone monitor is a portable breath acetone analyzer that measures the ketone level and calculates body fat burning rate in your exhaled breath. With the result you can determine your body fat burning rate as well as your optional ketosis state, it will help you plan your nutrition and fitness regime. This ketone Breath meter is a self-monitoring device for individuals following a Keto Diet. Keto meter saves you from finger pricks, and the device can be used repeatedly by replacing the mouthpiece; the ketone breath testing is a far more accurate method than urine strips testing, also more convenient because you only need to breathe with the monitor. Ketone breath analyzer with 4 LCD Display colors for indications: 0 reading with WHITE background, 0.1-3.9 readings with GREEN background, 4.0-4.9 readings with YELLOW background and over 5.0 readings with RED background. (Keto meter is with 64 memory records for ketosis testing tracking; this ketone meter is with rechargeable lithium battery 1000mAh, which could be used over 500 times or 3 months when fully charged).Best Sellers Rank: See Top 100 in Health & Household. Unit Count: 1.00 Count. Special Feature: Body Fat. Number of Pieces: 10. Brand: JASTEK. : B09QKDH1YP. Manufacturer: JASTEK. Date First Available: May 6, 2022. Package Dimensions: 5.31 x 3.54 x 1.77 inches; 6.63 Ounces.