What this means

The IEEE assigned the MA-L block A0F9B7 to Ademco Smart Homes Technology(Tianjin)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 A0:F9:B7, it is Ademco Smart Homes Technology(Tianjin)Co.,Ltd. hardware.