A. ### Functional Features 1. It uses advanced semiconductor sensors, which have high sensitivity, rapid response, and are simple and convenient to use. 2. The final test results are presented in both digital and cartoon modes, allowing anyone to use the tester for detection. 3. There are 5 result levels: Excellent, Normal, Good, Poor, and Very Poor. 4. It is equipped with a digital liquid - crystal display with an orange backlight and cartoon indicators, which is energy - saving and environmentally friendly. The colors are soft and may not harm the eyes. 5. It has fast response and recovery speeds and comes with a self - testing function to show different states. B. ### Technical Parameters 1. Sensor type: Semiconductor sensor 2. Heating time: 9 seconds 3. Blowing time: 5 seconds 4. Working environment: Relative humidity 95% (no condensation) 5. Power supply: 2 AAA batteries (not included) 6. Product dimensions: 95 x 36 x 18 mm / 3.74 x 1.42 x 0.71 inches C. ### Precautions 1. Due to manual measurement, an error of 0 - 1 cm may occur. Please confirm that you can accept this possible error before purchasing. 2. Due to differences between different displays, the pictures may not accurately represent the actual color of the product. Please understand. D. ### Package Contents 1 breath odor tester