What this means

The IEEE assigned the MA-L block 283545 to SHENZHEN CHUANGWEI-RGB ELECTRONICS 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 28:35:45, it is SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD hardware.