The Smart button is a control accessory, introduced by WiZ in 2022.
By default, every smart button is attached to one room. However you can edit this in Settings > Accessories > your button > Targets if you wish to control only a few lights in the room, or multiple rooms...
The button allows to turn the room on and off (short press) and adjust the brightness (long press).
The button is not directional: no need to point it at one light in particular. This makes it quite convenient if you just want to leave on the coffee table. Alternatively, you can place it on the wall in its holder.
The Smart button is compatible with all WiZ lights.
To set it up, you will need at least one of the lights of your room to be paired in the WiZ app and currently connected.
The button does not connect to your Wi-Fi router. Instead, it communicates directly with the lights in the home. This means you will be able to use it even if your Internet or your Wi-Fi goes down.
Its control range is typically around 15 meters.