The Apple 30W USB‑C Power Adapter offers fast, efficient charging at home, in the office or on the go. While the power adapter is compatible with any USB‑C–enabled device, Apple recommends pairing it with the 12-inch MacBook for optimal charging performance. You can also pair it with iPhone 8, iPhone 8 Plus, iPhone X or selected iPad Pro models to take advantage of the fast-charging feature. USB‑C to Lightning Cable is sold separately.
If you are unsure which charger your MacBook needs please refer to this article on the Apple website to determine which adapter is correct for your device: https://support.apple.com/en-au/HT201700