7EnglishRear viewInformation on USB 3.0• Compatible with USB 3.0 and earlier devices.• For optimal performance, use USB 3.0-certified devices.• Defined by the USB 3.0 specification (SuperSpeed USB).Left view# Icon Item Description1 Ventilation and coolingfanAllows the computer to stay cool.Do not cover or obstruct the openings.2 Headset/speaker jackConnects to audio devices (e.g.,speakers, headphones) or a headset withmicrophone.3 USB ports Connects to USB devices.If a port is black it is USB 2.0 compatible,if it is blue it is also USB 3.0 compatible(see below).4 USB port with power-offcharging5 HDMI port Supports high-definition digital videoconnections.6 Ethernet (RJ-45) port Connects to an Ethernet 10/100/1000-based network.7 DC-in jack Connects to an AC adapter.# Icon Item Description1 Optical drive Internal optical drive; accepts CDs or DVDs.2 Optical disk accessindicator Lights up when the optical drive is active.3 Optical drive ejectbutton Ejects the optical disk from the drive.