# II.	Start and turn off the instrument

It is important to know that unlike the screens we use daily, the Evo V2's display consumes absolutely nothing as long as it is not refreshed.

1. To start the instrument, simply press the start button. ![](/files/df3c243de1f8d16e00d516b98a725d7eed22f015)
2. If an error is detected during sensor initialization, a message will appear, otherwise you will go directly to the first flight screen.
3. Shutdown is automatic as soon as the instrument detects neither ground speed nor variometer for **20 minutes**. To turn it off manually, you can also press the main button for 3 seconds. If a flight is being recorded, it will be closed before the instrument powers off.


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