Description DIY Supplies:ELECTRICAL Origin:Mainland China Model Number:CH2O detector With LCD Screen Or Not:Yes Certification:NONE Is Smart Device:YES Measurement Range:0-9999 Gas Type:Formaldehyde Flow range:0-9999 model:CH2 weight:0.26kg Operating temperature:25 Continuous working time:480 size:90*70*40 power supply:3.7V lithium battery Measuring range:0-2mg Describe This product is an air quality monitor that detects CH2O, temperature and humidity. It incorporates sensors to monitor CH2O, temperature and humidity in real time on its display. Three-in-one multifunctional carbon dioxide detector, CH2O, temperature, humidity, Sensors monitor CH2O concentration, temperature and humidity in real time. It has functions of clock and calendar to improve the practicality of daily life. High-definition digital display large screen, real-time monitoring of digital changes. Built-in fan that draws in ambient air for more accurate real-time results. Rechargeable large-capacity battery, USB cable, extended use time. Specification -Product size: 90*70*40 -LED screen display - Temperature unit: Celsius -CH20 detection range: 0-9999 (L/min) Package Included 1CH20 detector 1English manual 1USB charging cable