Product Features 45W power adapter Easily recharges the lithium-polymer battery in your MacBook Air when the system is on, off or in sleep mode. Magnetic DC connector Provides a quick and secure connection, easily disconnects when experiencing strain and helps prevent the cable from fraying or weakening. LED indicator light Displays the charging status of your Mac Book. Travel-friendly design DC cable neatly wraps around the adapter for easy portability. AC wall adapter Makes powering your laptop while on the go very simple.