The Air Monitor 2 provides real-time monitoring of 7 metrics, including temperature, humidity, CO2, PM2.5, PM10, eTVOC and noise level. Additionally, the screen displays the date and time. The product has an alarm clock function that supports setting multiple alarms to meet daily routines. The product has top-level sensors built-in, along with the multi-mode compensation algorithm, the measured data is accurate and reliable. The innovative design of the vents enables sufficient contact between the air and the sensors to improve efficiency. The PM sensor adopts a -up design, which makes it easily replaceable. The 4Inch IPS touchscreen with 254 is super-clear, and its brightness can be adjusted automatically. Each metric has a color indicator under the number so that you can understand the indoor air quality and the noise level of your room at a glance. [Smart Wi-Fi Device, Supports + app] You can monitor the 7 metrics remotely in + app when the device is connected to 2.4GHz or 5GHz Wi-Fi. You can also check or export the historical data of the last 30 days. The productsupports firmware upgrades for new features and optimization. [Important Notes] 1. The product doesn't measure formaldehyde. 2. USB power adapter is not included in the package; the power input should be 5V1A. 3. Before purchasing this product, please make sure to confirm the following: If the device does not currently support connection to the for Mi Home server in your region, you need to switch the server address in the for Mi to " in order to use it (this operation does not with the interface language setting of the for Mi ). Note:Due to different production batches, there are differences in printed labels. There are slight differences between the actual product and the picture,which not affect normal use. Colour:White Material:Plastic Package Contents: 1 * Air Monitor Only the above package content, other products are not included. Note: Light reflection 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.