:The USB HDMI adapter for Monitor, with HDMI Port Output,can connect computer via USB interface to an HDTV, monitor, projector with HDMI interface.supporting 1080P@60HZ MAX, will deliver high-definition video sources,The usb to hdmi adapter can Mirror and Extend your display,Add more additional monitors easy. : Its not only USB A to hdmi monitor extender,but usb hub for laptop,3 ports USB3.0 HUBs(up to 5Gbps data transfer),This USB HUB with HDMI compatible with mouse, keyboard, hard disk, etc..Expand the use of devices on your desktop,Transferring your big files and pictures in seconds.You can even connect 3 more USB to HDMI adapters to extend 3 additional screens. :The USB HDMI adapter ,Both Mac and Windows systems support Mirror and Extend mode,In windows: compatible with Windows7,10,11 or higher,In MacOS: compatible with Mac OS 10.15 or higher.Att: ChromeOS, Android, iOS, Linux, Unix are not supported. 1:@