This 2-Meter Charge Cable With USB-C Connectors On Both Ends is Ideal For Charging, Syncing, and Transferring Data Between USB-C Devices. Pair the USB-C Charge Cable With a Compatible USB-C Power Adapter to Conveniently Charge Your Devices From a Wall Outlet and Take Advantage of Fast-Charging Capabilities. USB-C Power Adapters Sold Separately.
Apple recommends the following pairings:
12-inch MacBook with USB-C port with the 30W USB-C Power Adapter
13-inch MacBook Pro with Thunderbolt 3 (USB-C) ports with the 61W USB-C Power Adapter
15-inch MacBook Pro with Thunderbolt 3 (USB-C) ports with the 87W USB-C Power Adapter