Rubineta Thermo 2F/3F Concealed shower faucet. Mounting info and how does it work.

Easily maintained, concealed wall-mounted shower faucet.
Easy button controls. At the touch of a button, you can choose for the water to flow through the rain shower head or the handheld shower head.
The unique automatic temperature maintenance system ensures a consistent, comfortable, and safe water temperature in the shower, regardless of the changes of hot or cold water in the water supply system.
More info about Thermo 2F/3F: rubineta.com/en/catalogue/?fi...