IOGEAR Thunderbolt 2 Docking Station, GTD720 Operates at a rate of up to 20Gbps with Thunderbolt 2 Ultra-high speed bandwidth expansion for 4 times faster data transfer than USB 3.0, 40 times faster than USB 2.0 and 25 times faster than FireWire 800 Supports 4K (UHD) video output and high-speed file transfer simultaneously Supports dual displays for HDMI and Thunderbolt-enabled display monitors Ability to connect up to 8 devices directly to the dock and daisy chain up to 4 additional Thunderbolt devices (5 total) Dedicated USB charging port for tablets or smartphones Optical audio line-in/line-out port provides 5.1 digital audio editing and playback capabilities Only systems that include Thunderbolt 2 can take advantage of the 20Gbps transfer speed