This 4K 24x slot-loading external Blu-ray burner supports reading and burning Blu-ray, Dvd, and Cd discs. Cd read speed reaches 24x, while Blu-ray read and write speeds are both 6x. It can play 4K Blu-ray, Bd25/BD50, and 3D movies, meeting needs for system installation, data backup, and multimedia playback. It uses a Usb 3.0 interface for plug-and-play compatibility with desktops, laptops, Macs, and Windows/macOS systems. Note that when connecting to a desktop computer, use the rear Usb port on the computer case do not use extension cables or Usb splitters. When playing 4K/BD discs, your computer needs to have Blu-ray playback software installed. The package includes the burner, Usb cable, and instruction manual. It is an ideal backup device for solving the problem of a computer without an optical drive.