647BM68351232581. 5.25 inch optical disk drive bay. The 5.5 inch optical disk drive bay is for 5.5 inchDVD-ROM / CD-RW / DVD-RW devices.2. Optical disk drive eject button. Press this button to eject the optical disk drive tray.3. Optical disk drive bay (empty). You may install an additional optical disk drive in thisbay.4.. HDD.LED. This LED lights up when the hard disk drive operates.5. Power button. Press this button to turn on your computer.6. Microphone. This port connects to a microphone.7. Headphone port. This port connects to a headphone or speaker.8. USB 2.0 ports. These Universal Serial Bus .0 (USB .0) ports connect to USB .0devices such as a mouse, printer, scanner, camera, PDA, and others.9. USB 3.0 ports. These Universal Serial Bus .0 (USB .0) ports connect to USB .0devices such as a mouse, printer, scanner, camera, PDA, and others.• DO NOT connect a keyboard / mouse to any USB .0 port when installing Windows®operating system.• Due to USB .0 controller limitation, USB .0 devices can only be used under Windows®OS environment and after the USB .0 driver installation.• USB .0 devices can only be used as data storage only.• We strongly recommend that you connect USB .0 devices to USB .0 ports for fasterand better performance for your USB .0 devices.9 Front USB 3.0 port 2Front USB 2.0 port 3Front USB 2.0 port 4Front USB 3.0 port 1ENGLISHASUS BM665(MD560), BM685, and BP65(SD560) 1ENGLISH