A 60W MagSafe power adapter for MacBooks, like the Apple 60W MagSafe A1330, typically has an input of AC 100-240V, 1.5A, 50-60Hz, and an output of DC 16.5V, 3.65A, delivering 60 watts of power. These adapters are designed with a magnetic DC connector that detaches under strain to prevent damage. 
Here's a more detailed breakdown of the specifications: 
Model: Can be found as A1330 or A1184.
Watts: 60W.
Input: AC 100-240V, 1.5A, 50-60Hz.
Output: DC 16.5V, 3.65A.
Connector: MagSafe connector with an LED indicator, amber for charging, green for full charge.
Cable Length: Typically 1.78 meters (5.83 feet).
Compatibility: Designed for MacBook and 13-inch MacBook Pro models (and compatible with some older 15-inch models).