The product is MOPS·VIDA PM 2.5 Watchdog
Note: The product Chinese name is 忻 风 随身 PM 2.5 检测 仪
Product model: AD520-P001
Official Website: https://www.lianluo.com
Press release: https://family.pconline.com.cn/1040/10406965.html
Documentation: docs
Online Client: https://nicelabs.github.io/mops-vida-pm-watchdog