The MacBook Air power adapter depends on the year; older models (pre-2018) used the 45W MagSafe 2 Power Adapter (magnetic, amber/green LED, compact travel design), while newer models (2018+) switched to USB-C adapters, typically 30W or 35W (dual-port on some models), with optional fast-charging 70W adapters available, using a USB-C to MagSafe 3 or USB-C cable. The key features are the magnetic connector (MagSafe 2), the LED status light, and the compact, travel-friendly design with detachable AC cords.