Product name: Air quality detectorDisplay mode: LED digital displayMonitoring range: 0.000~2.888mg/m3 (formaldehyde)0.000~9.999mg/m3(TvOC)Battery: Lithium battery chargingDimensions: 15X6.8X5.5mmTest items: formaldehyde and TVOC in the air (including benzene)Detection principle: principle of semiconductor gas sensorConcentration unit: mg/m3Working voltage: 2.5~3.2VColor Category: White3rd generation particle sensor combined with unique particle swarm optimization algorithm makes particle measurement more accurate and stable.pre-calibrated that provides accurate formaldehyde molecule measurements.Detect a wide range of organic pollutants of VOCs.MULTIFUNCTIONAL & SCIENTIFIC – This indoor air quality monitor accurately assesses temperature (in C/F), humidity level, and multiple measures of air quality including concentrations of formaldehyde, total natural & synthetic organic compounds causing most odors (TVOC), and fine particulate matter (PM2.5/PM1.0/PM10) which travel deeply into the respiratory tract, reaching the lung alveoli.PORTABLE TESTING – Spot check or leave device on for continuous monitoring of indoor air quality. This easy-to-carry device can help monitor air quality at home, in the car, and in hotel rooms. Package Content:1 x Air Quality MonitorNote:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.