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 an external power supply, either via USB or the 12 V power connector. When connected to power the device cannot be switched off.

When disconnecting from an external power supply the box will automatically shut down if there is no loop connected and no passings have been recorded on the device since it was started.