The Apple 61W USB-C power adapter (model number A1718) is a fast and efficient charger compatible with various USB-C devices, including MacBooks and MacBook Pros. It delivers 61 watts of power and supports multiple output voltages for optimal charging. 
Key Specifications:
Wattage: 61W.
Input: 100-240V AC, 1.5A, 50-60Hz.
Output: DC 20.3V/3A, 9V/3A, 5.2V/2.4A.
Connectivity: USB-C.
Compatibility: MacBook 12-inch, 13-inch, MacBook Air 2018, and other USB-C devices.
Features: Fast charging, overvoltage protection, short circuit protection, overheating protection.
Safety: UL and FCC certified, with ABS fire-resistance and anti-fall materials.
Cable: Comes with a USB-C to USB-C cable. 
In essence, the 61W USB-C power adapter is a versatile and reliable charging solution for Apple devices and other USB-C gadgets, offering fast charging speeds and robust safety features, according to product descriptions on Amazon and MacSales.com.