StarTech.com Thunderbolt 2 4K Docking Station for Laptops - Includes Cable Ports Spec: 2 x Thunderbolt 2 (20-pin) Female 1 x HDMI (19 pin) Female 1 x USB 3.0 A (Fast-Charge; 9 pin; SuperSpeed) Female 3 x USB 3.0 A (9 pin; SuperSpeed) Female 1 x eSATA (7 pin; Data) Female 1 x Toslink (SPDIF; Optical) Female 1 x 3.5 mm Mini-Jack (4 Position) Female 1 x 3.5 mm Mini-Jack (3 Position) Female 1 x RJ-45 Female 1 x Security Lock Slot Female Weight: 3.50 lbs.