Promise SLE2002tNAA Sanlink2 Thunderbolt 2 to 10G Base-T Ethernet Adapter 2 Cable Dual 10 Gb/s Basset Ethernet Ports for networking. SANLink2 10 GBase-T connects a Mac Pro, MacBook or Windows HP Thunderbolt 2 devices to the local network to access shared media. Dual Thunderbolt 2 Ports, so you can daisy chain up to 6 devices total Backward compatible with Original Thunderbolt enabled systems and devices Auto negotiate with 10 Gb/s, 1 Gb/s, and 100 Mb/s LED indicators for connection speed, fan, and Link status