To turn Atmotube PRO 2 off:
Press and hold the main button for 5 seconds until the LED turns red.
Release the button.
The LED will blink red three times to confirm that Atmotube PRO 2 is turned off.
To turn Atmotube PRO 2 on:
Press and hold the main button for 3 seconds until the LED lights up.
Release the button.
The LED will turn solid red to confirm that Atmotube PRO 2 is powered on.