everything- I purchased this for my server that I use the Koutech IO-ASA120 IDE to SATA II Device Adapter ( 7 of them with 5 500GB drives and one 1.5 TB all WD drives. The 1gbs network link was necessary for the SATA drives and the ASA120 adapters. Also what I found was that the PCI to ISA expander have either 33 ohm series resistors or 220 ohm(SI680) that limits the cable length to 18 inches. If you change the resistors to 10 ohms you will be able to use 24" to 36" cables with reliability. I have been using these for over one month now and they are reliable. I also tried a Promise (Maxtor) ATA133TX2 and a SI0680 adapter together and they work fine. This allowed me to maintain all my server software and convert to SATA drives. The 1 GB net handles the faster I/O time without any issues. The switch is worth getting even the next model that is a few dollars more.
Its through USB and has an antenna.
Easy setup - no issues