PiPO Max-M7 pro - Manual (Page 20)

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Mobile networks: Turn on “Mobile Networks”→ “Data enabled”
whether you use a 3G dongle or SIM card, it’s required to turn on
“Data enabled” for mobile data transmission .
Sound: turn off touch sound by tapping “sound”—“touch sounds”
Display: To set Brightness, Wallpaper, Sleep time-out, Font size here.
Screenshot: Tap “Screenshot”, ticket the option “show screenshot
button on the status bar”. There will be a screenshot button on the bar.
Storage: Check internal storage here. If you insert a Micro SD card, or
USB disk, you can check the total and available space for your Micro SD
card or USB disk. Please unmount it to safely remove it.
Battery: Check the Battery status here.
Language & input: to set language and keyboard input.
Backup & reset: to go to submenu "back up my data" and "Factory
data reset". If you choose factory data reset, all data from your
tablet's internal storage will be erased. Choose this option carefully.
About Tablet: To check information about your tablet, such as Model
number, android version, etc.