Welcome to the store! Advanced semiconductor sensor, with fine sensitivity and fast accounting, simple and convenient to use. It displays the final test result in digital mode and comic mode, anyone can check themselves with this tester. 5 levels of results: very good, normal, not very good, bad, very bad. Digital LCD display and comic with orange backlight, saves energy and environmental protection, with soothing colors and does not hurt your eyes. Fast response and cv, with self-check to display different conditions. Portable design, small size with compact structure, easy to put in your pocket and carry with you. Touch-free design, breathe 5-10 mm from the detector, more . Battery saving design, low battery indication, 2 x AAA batteries provide long life (battery not included). Usage: Open the battery compartment, insert 2 * AA batteries and close the case. Press the button, it shows a 9-second countdown. Then the screen flashes "C", and at this moment, you can breathe evenly for 3 seconds at the inlet. After a beep, the result is displayed, the result is displayed for 5 seconds and automatically turns off. If you want to test again, press the button again. Specifications: Sensor Type: Semiconductor Sensor Warm-up Time: 9s Blowing Time: 5s Working Environment: Relative Humidity: less than or equal to 95% no dew points: 2 AAA batteries (not included) Item Size: 95 x 36 x 18 mm / 3.74 x 1.42 x 0.71 inches Color: white Material: plastic Package Contents: 1 x Bad Breath Detector (without battery) 1 x English User Manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real item. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!