Question about Microsoft Wireless Display Adapter

The radio connection between transmitter and receiver can be maintained in both the 2.4 or 5 GHz network. WPA2 is responsible for security. Videos can be transmitted in full HD resolution. The transmitter encodes multimedia via H.264. Sound is transmitted uncompressed in LPCM format (16 bit, 48 kilohertz) or optionally via AAC or AC3. Copy protection via HDCP 2.0/2.1 is also supported.

For data transmission, the devices must be paired with each other by pressing a button and exchanging an identification number or via NFC. The latter method is significantly faster, but both the sending and the receiving device must have an NFC interface.
Miracast is a manufacturer-independent standard for screen mirroring. Miracast can be used, for example, to display the screen of your mobile phone on the television. The Wi-Fi Alliance is behind Miracast. The organisation also develops the standards for wireless transmission via WLAN. Around 600 companies are represented in the industry alliance, including Apple, Dell, Intel, Google, LG, Microsoft, Sony, Samsung and many more.

This is how Miracast works:
Technically, Miracast is based on Wi-Fi Direct - an activation of the wireless bridge on the hardware is sufficient for data exchange, a connection to a WLAN network is not necessary. The specification of the standard is based on that of the Intel Wireless Display standard.