Thunderbolt 4 docking station for Thunderbolt 4 Windows laptops and Thunderbolt 3 and Thunderbolt 4 MacBooks (macOS 11 or later); if you have a Thunderbolt 3 Windows laptop, this is not the dock for you, see part # K34009US) Supports single 8K or dual 4K @ 60 Hz, single 4k @ 120Hz, or dual 1080P @120Hz Hz video output for Thunderbolt 4 devices; (note: any Macs with the M1, M2 or M3 chipset will only display to a single monitor due to Apples chipset limitations, but Macs with M1/M2/M3/M4 Pro or Max, and M4 base CPUs will work with dual displays)