"USB C DUAL HDMI 4K": With the USB-C to dual HDMI adapter, you can display your laptop's content on 2 monitors at 3840*2160@30Hz simultaneously. If only one HDMI interface is used, the resolution can reach 3840*2160@60Hz. .** Note: Please make sure your laptop, monitor, HDMI cable supports 4K or 60Hz, otherwise the output will not be 4K or 60Hz, the actual resolution depends on your device and video source. “MIRROR MODE AND EXTENDED MODE”: The Type C to HDMI adapter allows three different modes under Windows operating system. You can mirror a laptop or extend the screen to two same or different external displays (AAA, ABB, ABC). But due to the limitations of Mac OS, it does not allow extending two different screens under Mac OS (only compatible with AAA and ABB). Tablets/phones can only mirror one screen. “PLUG AND PLAY, PRACTICAL AND SAFE”: No driver/firmware required, plug and play. Wavlink USB C HDMI adapter, based on high quality aluminum alloy casing and featuring optimal chipset, is a stylish and solid solution for extending laptop screens. The adapter is also equipped with a safety system providing protection against overcharging, overloading and overheating. “WIDE COMPATIBILITY”: Compatible with Mac OS, Windows, Linux, Android system equipment, with a USB-C port that supports “DisplayPort Alternate Mode”.;