1Highaccuracy measurement, it uses semiconductor detection technology to find air quality problems more accurately. 2LED digital display + LCD screen, with backlight mode, the display is clearer at all times. 3Onekey control, the surrounding environment can be automatically detected after pressing the switch for three seconds, realtime monitoring once a second, the detection speed is fast, and more accurate values can be obtained. 41200mAh largecapacity battery, standby time is about 240360 minutes, can ensure longterm use. 5It can be widely used in agricultural planting, greenhouse planting, production warehouse, material processing, laboratories, households, etc. Item Type: Carbon Dioxide Detector Voltage: 5V Current: 500mA CO2 Measurement Range: 400-5000PPM CO2 Measurement Resolution: 1PPM TVOC Measuring Range: 0-2PPM Temperature Measurement Range: 0-50 Temperature Measurement Resolution: 1 Humidity Measurement Range: 0%-99%RH Humidity Measurement Resolution: 2%RH Battery: Polymer Lithium Battery 1200mAh (Battery Included) Charging Time: 2-3 Hours Working Time: 240-360 Minutes Product Size: Approx. 9x7x4cm / 3.5x2.8x1.6in Material: ABS Weight: Approx. 180-193g / 6.3-6.8oz 1 x Air Quality Detector 1 x Manual 1 x USB Data Cable