Operating Voltage:5V Product Support: 4 USB3.0 HUB & TF/SD interfaces Read Speed:CD-ROM 24X;CD-R 24X;CD-RW 24X;DVD-ROM 8X;DVD-R 8X;DVD-RW 8X Write Speed:CD-R 24X;CD-RW 16X;DVD-R 8X;DVD-RW 6X Note: Ipad/ Surface/ Chromebook are not supported. To ensure sufficient power supply, please connect this product directly to your computer USB port. Insufficient power supply may cause malfunction or other problems. Support Computers: laptop/ desktop/ notebook Driver: Plug and play, no extra driver needed Functional Features : This optical drive has a USB hub, a TF slot, one SD slot and two USB 3.0 downstream ports. Each USB port can be used as a standard port (SDP), Load- in line(CDP) or as a charger connection, which means it can be used as an extension of your computer to read files on your TF or SD cards and connect your USB keyboards, USB mouse, USB hard drive and other standard USB devices.