StarTech Thunderbolt 3 Dual 4K Dock for Laptops - Windows Only Compatibility: Windows 10 (32-bit or 64-bit), 8 / 8.1 (32-bit or 64-bit), 7 (32-bit or 64-bit) Ports Spec: 2 x Thunderbolt 3 USB-C (24-pin) Female 1 x DisplayPort (20 pin) Female 1 x USB 3.1 USB Type-C (24 pin; Gen 1; 5 Gbps) Female 1 x USB 3.0 A (Fast-Charge; 9 pin; SuperSpeed) Female 1 x USB 3.0 A (9 pin; SuperSpeed) Female 2 x 3.5 mm Mini-Jack (3 Position) Female 1 x RJ-45 Female Dimension: 1.00 x 3.10 x 8.70 Weight: 17.60 oz.