What voice commands can I use to control the thermostat?
You can use voice commands such as 'Set the temperature to 68 degrees,' 'Set cooling to 70 degrees,' 'What's the temperature in the house,' 'Turn off the heat,' 'I'm leaving,' or 'I'm home.' You can issue these commands using any connected Echo device or the Alexa app.
From the official Amazon Smart Thermostat manual, page 7
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