A. It is equipped with a 2.8 - inch color liquid crystal display (LCD) with 320 * 240 pixels. B. Users can adjust the ozone (O₃) alarm threshold to receive an alert when the ozone concentration rises. C. It can be used in office, indoor, and outdoor environments, as well as for detecting ozone residues after disinfection. D. It has a 2000mAh lithium battery with relatively large capacity. E. It has a built - in fan that can draw in the surrounding air for more accurate real - time detection results. F. Our products are made of good materials to provide you with a good user experience. G. We will try to ship the order within three days after purchase, and the estimated delivery time is 8 - 15 days. H. When shopping, please pay attention to the product's size specifications to ensure they meet your needs. In the product title and description, we have provided detailed information about the product, including its features and specifications. I. We hope you are satisfied with your purchase. Therefore, if you have any questions or concerns, please feel free to contact us. We will do our best to assist you. J. Thank you for choosing our products. Enjoy using them!