1 x DC IN, 1 x DVI-D, 1 x DVI-I, 1 x Headphone, 1 x Kensington lock slot, 1 x Microphone, 1 x RJ-45, 2 x USB, Rear: 2 x USB Resolution 1x 2560×1600 (with special dual-link DVI cable–option), 2x 1920×1200 "*A special dual-link DVI cable is required that connects to the two DVI ports on the w100 and outputs a dua, l-link DVI signal to a DVI monitor capable of supporting 2560×1600 resolution.