Accurate Air Quality Monitoring: Equip your space with the advanced Aeroanion Detector, designed to accurately measure the concentration of negative air ions. Ideal for ensuring optimal air quality in your home or office. User-Friendly Interface: This air negative ion tester features a clear, easy-to-read display and simple operation, making it accessible for both professionals and casual users. Portable and : Crafted with portability in mind, our detector can be easily transported between different rooms or taken outside, ensuring you can monitor air quality wherever you go. Applications: Perfect for use in environments, including homes, offices, schools, and healthcare facilities, to maintain a healthy air standard. Color: White Material: plastic Package Contents: 1 x Air Negative Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.