What this means
The IEEE assigned the MA-M block 9CE4509 to Shenzhen HQVT 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:E4:50:9, it is Shenzhen HQVT TECHNOLOGY Co.,LTD hardware.