?Easy to use?No power supply is required, just install the SiliconMotion driver, plug and play. You can easily download and install the driver after referring to the installation guide. Please note sometimes you need to authorize the recording function on MacOS when installing the driver for this usb hdmi adapter, please don't worry, it is a regular driver which is only the demand of the video extension chip technology, but not threaten your privacy. ?Widely compatible?HDMI dual monitor adapter compatible for mac OS, chrome OS and Windows 11/10/8.1/8/7. Before using, please refer to the attachment below. In addition, we provide you with permanent technical support for this USB to HDMI adapter for 2 monitor. ?Reliable SM768 Chip?HDMI USB adapter use SiliconMotion's premium chip SM768, which is a high-performance graphics processor. SM768 chip of this USB HDMI adapter supports any laptop/computer with built-in USB ports, has dual monitors and 4K ultra-high resolution, and the chip's CAT technology can reduce CPU load by up to 70%. ?4K Ultra HD HDMI Adapter?2 HDMI of this USB HDMI adapter can be expanded at the same time, port 1 up to 4K@30Hz resolution, port 2 up to 1080P@60Hz. USB to HDMI adapter designed for USB devices with full HD video resolution, is an excellent choice for expanding video practical tools. ?Support MacOS MST Extension ? Please note SiliconMotion drivers is requied. USB to HDMI dual monitor adapter supports mirror mode(A-A-A) and extend modes(A-B-B & A-B-C) for Windows/Mac OS, this USB 3.0 to HDMI adapter breaks the limitation of mac OS video extension. USB dual HDMI adapter for 2 monitors unlocks ABC extension mode for Mac OS allows you to do multiple tasks at the same time by extending 2 large screens/monitors.