My Mavic Air uses
The Mavic Air uses enhanced WiFi to communicate with the controller, essentially a high-power WiFi transmitter in the controller and a redesigned omnidirectional antenna in the landing gear of the Mavic Air. ... These communication protocols are much less prone to interference than Enhanced WiFi
So basically its not like the wifi you use in your home...technically its RF used between 2.4ghz and 5 ghz(like RC users). Some drones use GPS like the DJI Phantoms.
My Mavic Air can use GPS I am told which will give me he 2 mile range but...........I am only supposed to keep it within visual. Also I am scared of losing the drone way out there lol.
DJI Wi-Fi
DJI utilises a Wi-Fi transmission system on its beginner and consumer drones as a cost-effective method of control. The drone uses its own private Wi-Fi that the user connects to using a password.
DJI’s Wi-Fi allows users to control their dedicated remote controller or a mobile device, however, this will usually (VLOS) result in a reduced range.
DJI Drones Using Wi-Fi: DJI Spark and Mavic Air.
Dual frequency bands of 2.4 and 5.8 GHz are available with Wi-Fi, automatically switching for maximum control.
Two forms of W-Fi are currently used by DJI; standard Wi-Fi with the Spark and enhanced with the Mavic Air. The standard Wi-Fi gives the Spark a North American transmission range of up to 1640ft\500m and the enhanced Wi-Fi gives the Mavic Air a transmission range of 6561ft\2000m. These transmission ranges allow users to maintain VLOS (Visual Line of Site) with their drone, one of the US regulations.
Both Wi-Fi systems provide a video transmission in 720p to the connected mobile device. This allows a clear view from the drone’s camera for control and shot setup etc.
