External USB DVD/CD USB CD/DVD External Optical Drive Plug and Play, Hi-Speed USB 2.0, 1.1 standard CD Text, CD Extra, CD-DA (audio), CD-I, CD-ROM XA 8x DVD-ROM, 24x CD-ROM NOTE: Please make sure to connect the product to USB port of laptop. If connected to a USB hub or extension cords, it may not recognize the Driver or read the CD/DVD. For the desktops, please connect it to the USB port of the motherboard for normal use. While using the product make sure the power supply is normal, and connect the power cord to use at the same time.