With a single cable connect your thunderbolt 3 equipped macbook or laptop to two 4k monitors and multiple peripherals at 40gbps this cost effective thunderbolt 3 dock without power delivery supports your thunderbolt 3 port equipped macbook pro or windows based laptop plus the dock supports dual monitors so you can easily connect two 4k ultra hd up to 60hz displays one displayport and one thunderbolt 3 usb c port or a single thunderbolt 3 display 60hz merging performance with si