1. 2.8-inch color liquid crystal display (LCD) with 320 * 240 pixels. 2. Users can adjust the ozone (O₃) alarm threshold to be alerted when the ozone concentration rises. 3. It can be used in office, indoor, and outdoor environments, as well as for detecting ozone residues after disinfection. 4. It is equipped with a large-capacity 2000mAh lithium battery. 5. It has a built-in fan that can draw in the surrounding air for more accurate real-time detection results. 6. Our products are made of the highest quality materials, aiming to provide you with the best possible user experience. 7. We strive to ship the order within three days after purchase, and the estimated delivery time is 8 - 15 days. 8. 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. 9. We hope you are completely satisfied with your purchase. Therefore, if you have any questions or concerns, please feel free to contact us. We are always at your service and will do our best to assist you. 10. Thank you for choosing our products. Have a great time using them!