Features:1.Operating System: Support for Windows 98SE/ME/2000/XP/WIN7/VISTA operating system, support for OS8.6 or higher.2.High Performance: Power saving design, extra strong error correction, shockproof, low noise.3.Applicability: The DVD player is suitable for notebook computers, mobile PCs and compatible PCs.4.Power Supply Mode: USB bus power supply, using chip, no need for external power supply!5.DOS Booting: Using a chip, it can be used to boot the installation system and support USB booting before booting.specification:Item Type: External DVD PlayerMaterial: Aluminum AlloyApplicable Types: Notebook, Desktop, Netbook, All in OneInstallation Method: External, Usb Interface, Plug And PlayOptical Drive Type: COMBO DVD ROMInterface Type: USB2.0DVD: 8X Reading Speed, CD Reading Speed 24XBurning CD Speed: 24X DVD Does Not Support BurningCache: 2MInterface: USB 2.0, Backward Compatible With USB 1.0/1.1PackageList:1 x DVDPlayer1 x Data Cable1 x Power Supply Line1 x User ManualNoteOne of the tetragonum port is a USB data cable, which must be connected. The round port is a USB cable, which is used when the power supply is insufficient, and it does not matter if it is usually connected.