2
Function Description of Keys and Interfaces
/Volume-: Short press the button to turn up/down the volume.
Power Key
：
Long press it for 5 seconds to startup/shutdown; short press to lock
the screen, and wake it up by short press again.
Charge/USB interface: Used for connecting the computer, data transmission
devices and external devices, such as mouse, USB flash disks, and
OTG wires. At the same time, this interface is also the charger
interface.
TF Card Slot: Externally connect the TF card.
Basic Operations
Startup/Shutdown
In status of power-off, after long press the power key for 5 seconds, it will enter
into the main screen after displaying the startup picture.
In status of power-on, after long press the power key for 5 seconds, it will pop
up the dialogue box, and select “OK” key to shutdown, and the “Cancel” key to
keep the power-on state.
PC Connection
In status of power-on, after connecting with the computer using USB, select the
