DIGISTOR External 8x DVD Burner USB 2.0 Tray-Load Drive DVD drive powered via single USB connection, no wall adapter required. External DVD Burner Mac or PC compatible, connect to almost any system Tray-load DVD drive allows easy writing to CD, DVD or DVD-RAM at high speeds Lowest power consumption via USB (requires &lt;500mA power) Internal lithium-polymer battery for added power support