What this means
The IEEE assigned the MA-M block F41A791 to Jide Car Rastreamento e Monitoramento LTDA. 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 F4:1A:79:1, it is Jide Car Rastreamento e Monitoramento LTDA hardware.