Wide Compatibility: NOTE!!!Before you purchase, please ensure the USB-C port of your laptop support video output or DP Alt Mode, which decides the HDMI/DP/VGA port work or not. This hdmi dual monitor adapter works well with Thunderbolt 3/4 compatible devices: Dell XPS 13/15/17, Dell Latitude 13 7000/Latitude 13 E7370,Lenovo Yoga 720/ Yoga 910/ Yoga 920/ Yoga 930,HP Spectre x2 x360/HP Probook 450 G5/6/7,HP Chromebook 14,Surface Book 2,Surface Pro 9/8/7, Samsung Galaxy S9/S9+ etc USB-C to Dual 4K HDMI Adapter Hub 2 in 1: Attention!!! Mac OS ONLY support Mirror Mode(A-AA, A-BB), Can't extend two different Screen, due to Mac OS limitation.The dual monitor adapter expend your laptops FULL-FTEATURED USB C Ports into 2 hdmi port 4K@60Hz. You can enjoy movies, games with your families on external ultra HD big screen; Windows OS supports both SST and MST mode, if you not sure how to setting, please let us know, or download the user guide in Product information->Product informat