Power Off
Press and hold 
.
Release your finger after the indicator lights up in red for 1 second. The power turns off.
When the indicator light went out completely, the power is turned off.
If the BLUETOOTH device is NFC-enabled
If your BLUETOOTH device is NFC-enabled, using the NFC function allows the power to be turned off simply by touching the System with the device.
Touch the NFC antenna location of the BLUETOOTH device to the 
mark on the left of the System.
If no BLUETOOTH device is connected for about 5 minutes, the System automatically turns itself off.