RoHS stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE). All applicable products in the EU market after July 1, 2006 must pass RoHS compliance. The substances banned under RoHS are lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates (DEHP, BBP, BBP, DIBP). RoHS StarTech.com TB2DOCK4K2DP, Wired, Thunderbolt, 3.5 mm, 10,100,1000 Mbit/s, IEEE 802.3, IEEE 802.3ab, IEEE 802.3u, Silver StarTech.com TB2DOCK4K2DP. Connectivity technology: Wired, Host interface: Thunderbolt, Headphone connectivity: 3.5 mm. Ethernet LAN data rates: 10,100,1000 Mbit/s, Networking standards: IEEE 802.3, IEEE 802.3ab, IEEE 802.3u. Product color: Silver, Data transfer rate: 20 Gbit/s, Maximum digital resolution: 3840 x 2160 pixels. Power source type: AC, AC input voltage: 100-240 V, Input current: 2 A. Windows operating systems supported: Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64,..., Mac operating systems supported: Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.9 Mavericks