Does not support MST on Mac OS: For Mac OS, it only has mirror mode, and cannot extend two different screens due to Mac OS limitation. Not suitable for all USB-C port laptops, for example this adapter does not work with HP Pavilion/Lenovo IdeaPad, you need to confirm that the C port of the host device supports video output or DP Alt mode, if this is the case, you can usually see the DP logo next to the port Dual 4K Video Output：This USB-C to HDTV adapter allows you to mirror or extend your laptop’s display to two monitors simultaneously with resolutions up to 4K@30Hz, or up to 3840X2160P@60HZ when using a single HDTV port. Please note: The video output will be 4K only if your device supports 4K resolution, please make sure to use an HDTV 2.0 or better cable 100W Power Delivery and USB Data Transfer: Dual HDTV Adapter for 2 Monitors supports up to 100W fast charging (Does not come with a charger) and features a USB port for connecting various USB-C devices like hard drives, printers, projectors, keyboards, mice, and more to laptop and more. You may need to change the Default Audio Output Device setting in System Preferences to get sound Wide Compatibility: The HDTV splitter for dual monitors is plug-and-play compatible with a wide range of USB-C devices. (NOT Support HP EliteBook 745 G4 / HP Elitebook 820 G3 / HP EliteBook 828 G4 / HP 14s-be102TX / HP 14-ce1004TX 14 / HP Probook 650 G2 / HP Probook 455 G4 / HP Probook 430 G5 / HP Pavilion-14 bf116tx / HP Pavilion 15 ck009 / HP Pavilion Power Laptop 15-cb / Lenovo ideapad 340s, Tablets / Google Pixel phones / Acer Aspire A5 / Oneplus 5T Phone, etc) What You Get: A USB C hub multiport adapter compatible with various USB-C devices and supported by exceptional customer service dedicated to your complete satisfaction. Benefit from our 24-month unconditional return or replacement policy and 24/7 customer support. Don't hesitate to contact us for any queries Brand Fophmo Color Silver Manufacturer Fophmo Mfr Part Number ELEC-HC-89-Long-Silver Number of Ports 4 Total Usb Ports 1 Operating System macOS Compatible Devices Laptops Data Transfer Rate 60 Hz Enclosure Material Plastic Hardware Interface USB Type C Additional Features Plug and Play Warranty Description 1 year