Powerful Dual Output: Experience Power Delivery in a 30W USB-C PD output and the convenience of a 12W USB output- you can charge any 2 devices simultaneously at full speed. Perfect for power hungry devices including the Macbook Air! What is Power Delivery? What is Power Delivery? USB-C Power Delivery (PD) technology basically enables a device to take on high voltage power in a shorter amount of time, which translates to superfast charging. A specialized PD chipset detects each devices power needs and adjusts the output automatically. Less power wasted also means less heat, which helps keep your devices safe and preserve your battery life. MagSafe Compatible: Delivers the exact output recommended by Apple for peak performance and flawless compatibility with MagSafe Wireless Chargers. Folding Prongs: This compact charger is designed for travel with a durable drop-tested housing. Toss it into a briefcase, handbag, carry-on or backpack snag-free! World-Class Safety Features: Built