User's Manual

Table Of Contents

4-inch Visible Light Terminal

User Manual

Factory Reset 7.5

The Factory Reset function restores the device settings such as communication settings and system

settings, to the default factory settings (This function does not clear registered user data).

Tap Reset on the System interface and then tap OK to restore the default factory settings.

USB Upgrade 7.6

Tap USB Upgrade on the System interface.

The device's firmware program can be upgraded with the upgrade file in a USB drive. Before conducting

this operation, please ensure that the USB drive contains the correct upgrade file and is properly inserted

into the device.

If no USB disk is inserted in, the system gives the following prompt after you tap USB Upgrade on the

System interface.