The PRP-250C firmware version is available after 2018/07/12 in order to use the utility available switch USB UTP/VCOM mode.

Utility setting step :
1. Re-Power on PRP printer
2. run "Set USB Mode.exe"
3. Select Port "COM1 or LPT1 or Ethernet" ,then setting bps or IP
4. Select UTP or VCOM
5. press "Set USB Mode" Button"
6. If successful ,it well beep 1 times
7. Power off, Power On (Restar PC for VCOM mode)

On Windows 7, it requires VCOM to install the driver if it is not needed on Windows 10.
Restart windows to install the PRP-250C driver for VCOM mode.
