The 85W MagSafe 2 Power Adapter has a magnetic connector for ease of access and safety. It also helps prevent weakening of the cables over time. It also helps guide the plug into the system for a quick and secure connection.
An LED located at the head of the DC connector lights up. An AC cord is provided with the adapter for maximum cord length, while the AC wall adapter (also provided) gives you an even easier and more compact way to travel.