What this means
The IEEE assigned the MA-L block 606682 to SHENZHEN ATEKO PHOTOELECTRICITY 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 60:66:82, it is SHENZHEN ATEKO PHOTOELECTRICITY CO.,LTD hardware.