Apple’s First USB Type-C Power Adapter
The two standards of Type-C power charging are Google Universal Type-C Charger 60W and the Apple 29W USB Type-C Power Adapter which were the first two USB Type-C chargers made available in the market respectively.
Apple's USB Type-C Power Adapter, the 29W USB-C Power Adapter, provides 29.6 Watts (14.8 Volts at 2 Amps) or 12.5 Watts (5.2 Volts at 2.4 Amps). It's a lot smaller than the Google Universal Type-C Charger 60W which provides 15, 36, or 60 Watts.
I purchased the Apple 29W USB-C Power Adapter at the Apple Store in Westfield Valley Fair Mall in Santa Clara, California.
You'll want to only use Apple's USB Type-C Power Adapter with the Apple MacBook (Early 2015).