Portable lightweight design is ideal for mobile professionals. Plug and play no additional software drivers required. Hot-pluggable for ease of use- connect and disconnect without restarting your computer. USB 2.0 high speed. powered from the notebook's USB port- no ac adapter required. USB pass-through connector for additional USB devices. Includes Nero 6.0 software for DVD movie playback and cd/dvd burning. transfer rates (max) 24x cd/cdr/cd-rw read 16x cdr write, 8x DVD read 4x DVD write