Features 1、[Multi Functional] This detector measures CO2 and PM2.5 levels while also displaying time, date, temperature, and humidity, ensuring a safe living environment. 2、[Real Time Monitoring] With a sampling rate of 1.5 seconds per time, this CO2 PM2.5 monitor provides real time monitoring with high accuracy and sensitivity, guaranteeing reliable results. 3、[Alarm Equipped] Alerts with alarm sounds when PPM values increase (alarm can be muted). You can calibrate the CO2 detector to maintain its accuracy over time. 4、[Long Battery Life] Powered by a 2000mAh rechargeable battery, 2 hours of charging ensures 24 hours of use. Clear and adjustable brightness display screen allows for easy reading in various lighting conditions. 5、[Lightweight and Portable] Easy to carry with a stable stand, this air quality detector is suitable for use in homes, offices, classrooms, and other spaces, providing convenience and peace of mind. Specification Item Type: Air Quality Monitor Material: ABS Screen Display: High Definition LCD Screen CO2 Detection Range: 0-5000 ppm PM2.5 Detection Range: 0-999 ug/m³ Temperature Detection Range: -10℃ to 50℃ Humidity Detection Range: 20%-85% RH Sampling Time: 1.5 Seconds Battery: 1 x 2000mAh Rechargeable Lithium Battery (Built in) Package List 1 x Air Quality Monitor 1 x User Manual 1 x Storage Box 1 x USB Cable