These are originally Dell H310 RAID SAS controller cards that is flashed to IT Mode for use with ZFS. They have been cross-flashed to Avago / LSI 9211-8i IT (Initiator Target) firmware version P20 and LSI bios so that it is easier to access the controller's ROM without booting an OS. 

1. LSI Avago IT mode. version P20 (20.00.07.00)
2. MPTSAS2 BIOS ROM version 07.39.02.00
3. Original SAS address preserved

These are based on the LSI SAS2008 SAS controller chipset and support PCI-E 2.0 specifications with x8 lanes. The controller has 2x SFF-8087 connectors for a total of 8-port. You will need a compatible cable to connect these to your hard drives or a backplane.

These cards were known to run on storage server running ZFS on Linux (ZoL), but setup is also ideal for other ZFS setups, FreeNAS, unRAID, Proxmox VE, etc.