If the monitor of your laptop is not enough space to complete the work, then this usb-c dual hdmi will be an ideal choice! You can do more project on different monitors. You can used in work, home,school. Aluminum Plate for strong antioxidant capacity. Safety wire core for high quality insulation outer layer. If you have any questions about the product please feel free to contact us, we Provide 12 months warranty + Lifetime technical support + Friendly after-sales service within 24 hours. Enjoy Crystal-Clear 4K UHD Image: This dual hdmi usb c adapter’s 1 HDMI port is used, max resolution up to 4K@60Hz. This 2 hdmi monitor adapter ‘s 2HDMI port are used,max resolution up to 4K@30Hz. Support extend mode and mirror mode. Support MST and SST for win laptop. Please note the mac laptop only support mirror mode(CANNOT extend 2 different images on monitors). This usb c to hdmi adapter resolution up to 4K(3840X2160P@60HZ), dual monitor with HDMI at 3840x2160@30Hz; Dual monitor HDMI adapter also support 1440p and 1080p at 60Hz offered by the DisplayPort MST technology; with this high-performance USB-C adapter when you play games the screen without any millisecond delay. (Important: ONLY when your devices support 4K resolution, the video output will be 4K,please make sure to use a HDMI 2.0 cable or better.). This HDMI Reader works well with Thunderbolt 3 compatible devices,such as MacBook/MacBook Pro2020 2019 2018 2017,MacBook Air2020-2018,iPad Pro 2018 ,Dell XPS13/15,Samsung Galaxy S9/S9+,etc. For Mac OS, it ONLY Mirror Mode, Can't extend two different Screen, due to Mac OS limitation; Connect device with USB Type C (tunderbolt 3) port to two external monitors with 4K HDMI output; 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 contact us, or download the user guide in Product information->Product information.