Buttons and ports
1. Pictorial guide to buttons and ports
(Pictures are for reference only)
2. Instructions for buttons and ports
1) Power/Lockscreen: long press it for about 2 seconds when the
device is off to turn it on; long press it when the device is on to pop up
the menu of reboot/shutdown; short press it when the device is on to
turn off/wake up the screen; long press it for about 10 seconds to reset
the device.
2) Previous track: short press to play the previous track; long press to
rewind.