Features: Multiple Functions: the air quality detector is available for real-time detecting the PM2.5, PM10, CO2, temperature, and relative humidity. Large Digital Display: 2.8 inch TFT LCD color screen simultaneously display the temperature, humidity, CO2 concentration, PM2.5, PM10. Air Quality Remind: with sound alarm, and the color of the measured value will variable according to the pollution grade. High Accuracy Sensor: fast detecting, auto refresh, precise and reliable. Touch Button Control: two high sensitivity touch buttons are designed for power ON/OFF and mute ON/OFF. Portable Compact Size: measured size in 4*2.8*1.3 inch and only weights 5.8oz, the palm-size detector is little and exquisite, easy to carry and convenient for use. Wide Applications: the versatile detector can be used in home, office, school, to detect and monitor the indoor air quality. Specifications: Material: ABS Input: 5V/1A Detection Float: 3~30% Start-up Preheating: 0~2 minutes Charging Time: Approx. 5 hours Standby Time: Approx. 15 hours Detectable Substance: PM2.5, PM10, CO2, TEMP, RH Battery Capacity: 3.7V, 2500mA Item Size: 106 * 72 * 33mm / 4.17 * 2.83 * 1.30in Item Weight: 165g / 5.83oz Package Weight: 305g / 10.78oz Package Size: 16.5 * 10.5 * 5cm / 6.50 * 4.13 * 1.97in Packing List: 1 * Detector 1 * USB Cable 1 * Manual (English)