Product Features 60-watt power adapter Powers the lithium-ion battery while system is off, on or in sleep mode. Also charges without the battery present for added convenience. Magnetic DC adapter Disconnects the power cable if it experiences strain to prevent fraying or weakening of the connection. LED indicator lights Display charge status. Travel-friendly design DC cable neatly wraps around the adapter for easy portability.Apple, MacBook, MacBook Pro, FireWire, QuickTime, iTunes and Mac OS are trademarks of Apple Computer, Inc. Compatible with MacBook and 13″ MacBook Pro To keep your laptop charged and ready to use.