Questions about Microsoft Wireless Display Adapter

This version allows resolutions of up to 3840 x 2160 (4K/UHD) at 30 frames per second.

Not a reliable product. Disappointing

Unfortunately, no idea. I stream from the notebook to the WD adapter.

Should work The adapter works like a normal additional screen. However, the display would have to be set to "extended" and not "duplicated" in the settings. As with any other screen.

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.

This wireless adapter is based on Miracast. Miracast is based on WLAN. However, an ad-hoc connection is also possible; i.e. directly from the notebook to the adapter; without WLAN infrastructure.

Definitely. The adapter is addressed like an HDMI device, audio is included.

This adapter enables signal transmission from e.g. Sureface devices to a monitor. You can decide whether you want to duplicate the image content 1:1 or use the connected display device as an extension of your desktop.

The adapter does support 4k.

I can't answer that. I use both MS display adapters and find that the new model doesn't really work smoothly with 4K. I use the Surface 7Pro+ and the Surface Go2 and a Samsung Galaxy Tab6 for transferring. With the two Surfaces, the adapter (also from MS) seems to have its fair share of trouble. It often does NOT work. I am sending 2 adapters back today.

Yes it supports resolutions up to 3840 x 2160 (4K/UHD)