Overview 49 USB 3.0 connectors (2)Used to connect a USB-compatible device. For optimal datatransfer, connect a USB 3.0 device to a USB 3.0 connector insteadof a USB 2.0 connector.10 USB 3.0 connectors (2)Used to connect a USB-compatible device. For optimal datatransfer, connect a USB 3.0 device to a USB 3.0 connector insteadof a USB 2.0 connector.11 Illuminated red dotThis indicator is on when the computer is on.12 Internal speaker (optional)Used to listen to the sounds from your computer without using aheadset or headphones.