What this means
The IEEE assigned the MA-M block 04EEE8D to SHENZHEN TOPWELL 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 04:EE:E8:D, it is SHENZHEN TOPWELL TECHNOLOGY CO., LTD. hardware.