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