What this means
The IEEE assigned the MA-L block E009BF to SHENZHEN TONG BO WEI 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 E0:09:BF, it is SHENZHEN TONG BO WEI TECHNOLOGY Co.,LTD hardware.