What this means

The IEEE assigned the MA-M block 9CE4508 to ROHOTEK(shenzhen) Technology 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 9C:E4:50:8, it is ROHOTEK(shenzhen) Technology co., LTD hardware.