Multi-language MVR

Multi-Language MVR will allow users to set the user-interface language.
Main features:
- Backup Settings and Import Settings from PC functions help to backup the data of settings in the computer and to import the data into the ecig, which allows different data in different devices.

- Reset function is to reset data and settings in ecig, including options of normal (reset settings) and factory (reset to factory status).
- Inverse function is to inverse color of LED to improve outdoor display.