This Apple A1379 Silver USB SuperDrive External USB Optical CD/DVD Drive is a reliable option for anyone looking to read and write CDs and DVDs. It is compatible with Mac systems and has a writable format of DVD-R, CD-R, DVD+RW, DVD+R. The external drive has a form factor of 0.7 in and is USB-powered. It has a write speed of 24x and can read CD-R discs. The unit is in used condition but has been tested and is in good working order. Use it to store or transfer data from your computer