Check the back of the device or under the mounting plate. For many brands the app shows the exact model under device settings, which is handy once it is mounted.

What Xiaomi Smart Home & Security manuals cover

Setup mode and pairing
Light ring and LED meanings
Reset buttons
Mounting and wiring
Battery and power requirements

Common jobs

Factory reset

How to factory reset almost anything

Button holds, menu paths and what you lose

Setup & install

Setup and installation instructions

First use, pairing and installation

Wiring

Wiring diagrams and terminal labels

Thermostats, doorbells, chargers