Use my connected product

• If there is a power cut or Internet outage, will my Smarther with Netatmo connected thermostat still work?
• Is it possible to turn off my Smarther with Netatmo connected thermostat manually?
• How can I switch my Smarther with Netatmo connected thermostat from heating to cooling mode?
• Is it possible to turn on the touch sound on my Smarther with Netatmo connected thermostat?
• Can I change the screen brightness of my Smarther with Netatmo connected thermostat?