Alternative to Microsoft Display Dock for just $ 25
If you think that Display Dock from Microsoft is too expensive, you’re right. However, there is a much cheaper alternative to format USB adapter-C-HDMI, which provides full compatibility with the new Continuum feature in Windows 10 Mobile.
The result is almost the same, except that in this case excludes the possibility of the connection of such devices as the mouse and keyboard (if they don’t work via Bluetooth). In addition, although the adapter supports a resolution of 4K image transmission with the Lumia 950 or 950 XL to an external display running at a maximum resolution of 720p (Display Dock Microsoft provides 1080p and 60 frames per second).
The price of this thing is only $ 25. You can buy on Amazon. Surely soon there will be other similar adapters from other companies.
An even cheaper way is to use a wireless Protocol, Miracast, if your TV or monitor supports it. Otherwise, you can purchase a Miracast dongle. However, if you use wireless connection, you may experience a delayed reaction interface, albeit minor.