1. ### Functional Features 1. It uses advanced semiconductor sensors, featuring high sensitivity, rapid response, and is simple and convenient to use. 2. The final test results are displayed in both digital and cartoon modes, enabling 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 orange backlight and cartoon indicators, which is energy - saving and environmentally friendly. The colors are soft and will not harm the eyes. 5. It has fast response and recovery speeds, and comes with a self - testing function to display different states. 2. ### 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 3. ### Precautions 1. Due to manual measurement, an error of 0 - 1 cm is allowed. Please confirm that you can accept this error before purchasing. 2. Due to differences between different displays, the pictures may not accurately reflect the actual color of the product. Please understand. 4. ### Package Contents 1 breath odor tester