The OntheGo 5-in-1 Multiport Adapter does not need its own power adapter. The OntheGo 5-in-1 draws power from the MacBook Neo through the USB 3 port. If you want to use HDMI and charge your MacBook Neo at the same time, plug your USB-C charger into the USB-C Power Delivery (PD) port on the OntheGo 5-in-1, which supports up to 60W.