2 x e.SATA Channels. - Friendly Management GUI, Up-to-date Driver for most common platform - Max. support 2 SATA HDs ( up to 750GB).- Compatible with G4, G5 Dual or Quad with PCI-X slots, Windows, Linux and FreeBSD - RAID 0, 1, JBOD and NonRAID Supported - HotSwap feature. - 2 External ports - 150 Mb/s per Port - PCI 33 MHz - Volts 3.3 and 5.0. Mac compatible.