The Genuine Apple MagSafe 2 45W Power Supply Adapter is designed specifically for the MacBook Air 13-inch models. It is compatible with various MacBook Air 11-inch models from Mid 2012 to 2017. The power adapter has a voltage output of 14.85V and a current output of 3.5A, ensuring efficient charging for your device. The adapter is in white color and is a genuine Apple product, making it a reliable and safe choice for charging your MacBook Air.