HDMI Splitter for Dual MonitorsThis usb c to dual hdmi adapter enables you to mirror or extend your laptops display to two monitors simultaneously, supporting resolutions up to 4K at 30Hz. Plug and play, no need any drivers and external power connection. Please note: not for all usb-c port laptops, Make sure your laptop or PC support video output (Thunderbolt 3/ Thunderbolt 4 ) or DP Alt Mode, which decides the hdmi port work or not. Mirror and Extend Mode For Mac OS, it only has mirror modeA-AAA-BB, and cannot extend two different screens due to Mac OS limitation. For Windows OS, it supports dual hdmi to display different screensA-AAA-BBA-BC). If the monitor of your laptop is not enough space to complete the work, then this dual hdmi adapter will be a good choice!