MikroTik RB564 Daughterboard for the RB532.
Adds four more MiniPCI slots and six ethernet ports.
Specifications:
https://www.ispsupplies.ca/core/media/media.nl?id=9731648&c=393682&h=p1lwjOL1uDIsGQPUKwfZ7ofznfUBYYCRXmh1hU5BLlPYVAI3