The Apple Magsafe 2 45W Power Adapter, model MD592LL/A, is a white power adapter specifically designed for Apple MacBook Air laptops. With a voltage of 14.85V and an output current of 3.05A, this adapter provides the necessary power to charge and run your MacBook Air. Made in China, this genuine Apple product ensures compatibility and reliability for your device. The open box indicates that the item may have been previously used, but it is still functional and ready to provide power to your MacBook Air.