Features Accurate measurement fast and accurate U shaped design Alarm reminder long standby greenhouse compensation calibration The SEN algorithm is intelligently calibrated to quickly respond to complex air environments It is equipped with formaldehyde and TVOC detection module which can display formaldehyde concentration per cubic meter TVOC content and AQI level in real time Specifications Name Formaldehyde DetectorModel B37919Color whiteMeasurement Accuracy 0 1Measuring Object HCHO TVOC AQIAlarm Mode buzzing alarmBattery 2x AAA battery not included Package Included 1 x Formaldehyde Detector1 x Cable