1Accurate measurement, using highaccuracy infrared detection technology, can more accurately find air quality problems. 2The reading is clear, LED digital display + LCD screen + backlight mode, the display is clearer and convenient for reading. 3Easy to use, onebutton control, press the switch for three seconds to automatically detect the surrounding environment. Realtime monitoring once a second, fast detection speed. 4Long battery life, 1200mAh largecapacity battery, standby time is about 240360 minutes. Can be used with confidence. 5It is widely used in agricultural planting, greenhouse planting, production warehouse, original material processing, laboratory, family, etc. Item Type: Carbon Dioxide Detector Material: ABS Weight: Approx. 193g / 6.8oz Product Size: Approx. 9x7x4cm / 3.5x2.8x1.6in 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 (included) Charging Time: 2-3 hours Working Time: 240-360 minutes 1 x Air Quality Detector 1 x Manual 1 x USB Data Cable 1. Please allow 1& 8209;2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.