Asus VivoTab RT - Manual (Page 47)

TF600T 
Turning your Tablet PC off
You can shut down your Tablet PC by doing either of the following:
Tap from the Charms bar then tap > Shut down to do a normal
shutdown.
•
From the log-in screen, tap > Shut down. •
If your Tablet PC is unresponsive, press and hold the power button for at least
eight (8) seconds until your Tablet PC turns off.
•
Putting your Tablet PC to sleep
To put your Tablet PC on Sleep mode, press the Power button once.