Description Bullet Points: 1Easy to Operate: This air quality monitor can be connected to the phone APP, and the data can be viewed on your phone.(NITE:It is only suitable for Android systems.) 2Practical and Functional: This air quality monitor provides real-time monitoring and real-time display of carbon dioxide concentration per cubic meter to help users understand the environment. 3Clear Display: This device provides smart and clear display to allow easy reading. By changing the color, it reminds the user to care more about the environment.. 4Long Battery Life: This device is battery-operated, and you can also use the included USB cable to charge it first, the use time lasts 5-6 hours on a single charge(it takes more than 3 hours to be fully charged). 5Wide Applications: This CO2 monitor is suitable for offices, homes, gyms and other scenarios. It is versatile and useful to help you know more about the environment you are in. Description: Thiscarbondioxidedetectorissmallandportable,andcanclearlydisplaythetemperatureandhumidityoftheenvironment.Itissuitableforoffices,homes,gymsandotherscenarios. Features: Itcanbeconnectedtoamobilephone,andthedatacanbeviewedontheAPPonthemobilephone,and30-daystoreddatacanberead. Real-timemonitoringandreal-timedisplayofcarbondioxideconcentrationpercubicmeter. Itcandetectanddisplaythetemperatureandhumidityoftheenvironmenttohelpusersunderstandtheenvironment. Itissuitableforoffices,homes,gymsandotherscenarios. Smartandclearcolorscreendisplay,easytoread. Inthealarmmode,theuserisremindedtocaremoreabouttheenvironmentbythechangingcolor. IthasalongservicelifeandcanbechargedwithaUSBcable. Itissmallandportable,easytocarry,doesnottakeuptoomuchspace,andcanbeinstalledathome. Battery: Thebatteryindicatorkeepsflashingwhencharging,andtheindicatorwillflashwhenthebatteryisfullycharged(usuallymorethan3hours).Theusetimelasts5-6hoursonasinglecharge(3hourstobefullycharged). Specification: Material:ABS Measurementaccuracy:1ppm Measuringrange:400-6000 Workingvoltage:3.7V Current:120mA Power:0.4W Battery:3.7V,1500mAh Productsize:about89*70*35mm/3.50*2.76*1.38inch Productweight:about142g Packingsize:about141*98*48mm/5.55*3.86*1.89inch Packageweight:about210g PackingList: 1*CO2Monitor 1*USBCable 1*Manual Notes: Duetothelightingeffectsandshootingangles,thecoloroftheitemandthatshowninthepicturemighthaveanuance. Duetomanualmeasurement,theremightbeatoleranceintheproductsize.