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 check themselves easily. Features 5 result levels: very good, normal, not very good, bad, and 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 perform another test, press the power button again. Specifications: Sensor type: Semiconductor sensor Warm-up time: 9 seconds Blowing time: 3 seconds Working environment: Relative humidity ≤ 95%, non-condensing 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 (without battery) 1 x English instruction manual Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.