Description:Application Technology: Air Natural FlowModel: HLW-101Display Mode: LCD color screen digital displayError Fluctuation: 3%-30%Size: 120mmx72mmx4mmWorking Voltage: 5VBoot Preheating: 120S (formaldehyde TVOC sensing only)Battery Capacity: 1200mACharging Time: about 4hrsStandby time: about 240-360 minutes5-in-1 Air Quality Monitor:HCHO (formaldehyde): 0-1 712mg/mTVOC (Volatile Organic Compounds): 0-12 50mg/mCO2: 400-5000PPMTemperature: -20C~60CHumidity: 20-99%Specifications:1 Upgrade the indoor air quality monitor with built-in DART electrochemical sensor, which can accurately detect carbon dioxide (CO2), formaldehyde (HCHO), volatile organic compounds (TVOC) and Temperature and humidity 2 This new model can provide real-time data and average value It is suggested that you focus on the average value of each gas after testing, because the real-time data is unstable due to long-term monitoring 3 Everyone needs to know the air quality of the place where you live This air display has a LCD digital color screen, which is large and easy to read 4 This air monitor is easy to operate, and only needs to press the function button The whole page design makes it easy for everyon