The top button is to start/stop shower accessory, the bottom control adjusts the temperature.
Features
> Manufactured from solid brass.
> Suitable for water systems between 1 to 4 bar pressure.
> Suitable for all water systems.
> Thermostatically controlled.
> Built-in anti-scald device.
> Suitable for use with shower pumps.
> Lifetime guarantee.
> Concealed Valves for a modern minimal look
> Recessed for a streamlined appearance
> Multi Control functions
> Ceramic disc technology for a smooth operation
> 100% brass construction body and trim set
> Solid brass face plate
> All Concealed Valves are WRAS approved