Multifunction HDMI 4in1 simultaneous display converter,Only Duplicate/Mirror screens,This adapter allows you to connect from your HDMI small size input device(Laptops,Computers etc) to your Big Size HDMI VGA or DVI Output Screens(like monitors,projectors,HDTVs) via a HDMI VGA or DVI cable(needed,but not included),Please be well note that you can connect three monitors simultaneously in your Windows System Devices,while in Mac OS Devices,HDMI and DVI can not be connected together 1080p Video Output:When you use our Adapter,you can duplicate your input devices' screen to your external HDMI and VGA DVI Monitors,if you connect more than one additional displays,all your screens can only have same view.It max support to output 1080p resolution Audio synchronous transmission:If you would like to output Audio via our Adapter,please connect from our adapter's audio 3.5mm jack to your external speakers ,then the sound come out in your speakers;but if one of your HDMI monitor with audio output and speakers built in,the sound can be also directly transmitted to your attached HDMI displays along with the video.Note:Does not work with Chromecast to get audio for TV or Monitor.