This is a compact indoor PM2.5 detector, designed to measure air quality and temperature and humidity levels in your home or office. With its small size, this device is easy to use and provides accurate readings to help you maintain a healthy living environment. Features: Compact and portable design makes it easy to carry and use in any room of your home. Large screen displays PM2.5 index, indoor temperature and humidity readings, providing clear and convenient readings. USB rechargeable design ensures long-lasting use and convenience. Alarm function alerts you when air quality is poor, allowing you to take action to improve your home environment. Accurate and reliable readings help you monitor and maintain healthy indoor air quality. Specifications: Main color: black+white PM2.5 measuring range: 0-999ug/m3 Battery: 3.7V, 1600mAh Item size: 84 * 80 * 52mm / 3.3 * 3.1 * 2.0in Item weight: 120g / 4.2ounce Package size:114 * 104 * 67mm / 4.5 * 4.1 * 2.6in Package weight: 250g / 8.8ounce Packing List: 1 * Air Quality Analyzer 1 * User Manual