Introducing the world's first Thunderbolt display. Thunderbolt technology built in. Thunderbolt I/O technology lets you move data between your devices and your computer with unprecedented speed. With two channels 10Gbps throughput in both directions, it's up to 20 times faster than USB 2.0 and up to 1w times faster than FireWire 800. Allows you to connect to as many as 6 devices through a single compact port. With just one cable, connect any thunderbolt enabled mac and get 27 inches of high resolution screen space, high quality audio, facetime HD camera, firewire 800 and gigabit ethernet ports. Monitor: 27in . Brightness 375cd/m2. Built-in speakers.