Download the following.
Root Ainol Elf 2
- Copy root file that you already download to external
sdcard.
- Turn off the device, make sure it`s not connect with charger or PC
- Press and Hold Power + Volume[-] buttons until
bootloader menu show up (the volume [-] isn't the one nearest the power
button, it's the other one).
- Select recovery mode (use volume [+] and [-] to
scroll through menu options, [back] to select)
- Choose Apply Update from SDcard
- Select zip root file (elf2_root_signed.zip)
- Wait until the process is done
- Reboot and done.