To turn the box on, press and hold the button until the center red LED turns off and a boot screen is displayed with information about the system. 

To turn off, press the button once. The screen will display the following:

Press the button again to turn off.

The box will also turn on automatically when connected to via USB and cannot be switched off.

When disconnecting the USB, the device will automatically shut down if there is no loop connected and no passings have been recorded on the device since it was started.