What this means

The IEEE assigned the MA-M block F0D7AFD to Dongguan Gedi Electrons Techeology Co.,LTD. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting F0:D7:AF:D, it is Dongguan Gedi Electrons Techeology Co.,LTD hardware.