Apple Thunderbolt to Gigabit Ethernet cable adapter
Apple Thunderbolt / Gigabit Ethernet. Track 1: Thunderbolt, Track 2: RJ-45, Gender: male/female. Product Color: White. Compatible operating systems: OS X v10.7.4 +, Compatibility: MacBook Air, MacBook Pro. Network connection topology: Gigabit Ethernet network standard: IEEE 802.3, IEEE 802.3ab, IEEE 802.3u