Advanced semiconductor sensor with fine sensitivity and quick response, simple and convenient to use. Displays the final test result in digital and cartoon mode, allowing anyone to perform self-testing. Features 5 result levels: very good, normal, not very good, bad, very bad. Digital LCD display with cartoon icons and orange backlight, energy-saving and environmentally friendly, with soft colors that are easy on the eyes. Fast response time with self-check function to indicate different conditions. Portable design, compact size and lightweight, easy to carry in a pocket. Non-contact design – breathe 5-10mm from the detector for more hygienic testing. Battery-saving design with low battery indicator. Powered by 2 x AAA batteries for extended service life (batteries not included). Usage: Open the battery compartment, insert 2 x AAA batteries, and close the compartment. Press the power button to start; the device shows a 9-second countdown. The screen flashes "C" – at this point, breathe evenly for 3 seconds into the air inlet. After a beep, the result will be displayed for 5 seconds before the device automatically shuts off. To test again, press the power button once more. Specifications: Sensor type: Semiconductor sensor Warm-up time: 9 seconds Blowing time: 3 seconds Working environment: Relative humidity ≤ 95% RH, no condensation Power supply: 2 x AAA batteries (not included) Item size: 95 x 36 x 18mm / 3.74 x 1.42 x 0.71in Color: White Material: Plastic Package Contents: 1 x Bad breath detector (battery not included) 1 x English instruction manual Note: Light and screen display differences may cause slight color variations between the image and the actual item. Measurement error allowed within +/- 1-3cm.