Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter, and the smoke alarm function.It can detect and display the temperature and humidity of the environment to help users understand the environment.It is suitable compatible with offices, homes, gymnasiums and other occasions, with a wide range of applications.Intelligent color screen display, clear numbers, easy to identify and read.In the alarm mode, the user is prompted to pay attention to the environment by changing the color.It has a long service life and can be charged with a USB cable.It is small and portable, easy to carry, does not take up too much space, and can be installed at home.Measurement accuracy: 10ppmMeasuring range: 400-5000Working voltage: 3.7VCurrent: 120mAPower: 0.4WBattery: 3.7V, 1400mAhColour:whiteMaterial:ABSSize:102 x 52 x 140mm weight: 265gPackage Contents:1 x co2 monitor1 x usb cableOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.