Dell USB 3.0 Triple Display UltraHD Universal Dock – D3100 – Black. Ultra HD (Support 4K2K Display) / Triple Display. Triple (1 x DP / 2 x HDMI). Ports: 3 x USB 3.0 (Front) with 2 x BC1.2, 2 x USB 2.0 (Rear), 1 x Headphone,1 x Audio out, Cable Lock Slot (Lock excluded). Gigabit Ethernet Port (LAN) with PXE boot (Post RTS for XPS 13 only).