1) 2 in 1 USB-C to Dual HDMI Adapter: supports devices with a USB-C (Thunderbolt 3) port to drive two external HDMI displays, enabling movies or games on a large screen for family viewing. On MacOS, only SST mode is supported, so both displays mirror the same image due to OS limitation. Windows supports both SST and MST modes for extending or mirroring. If you are unsure how to set up, please contact us. 2) 4K video and smooth playback: HDMI outputs up to 3840x2160 at 60Hz. When both HDMI ports are active, each port can reach up to 3840x2160 at 30Hz. The adapter is backward compatible with 2K/1080p at 60Hz, and provides low-latency visuals during gaming. Note: 4K output requires devices that support 4K and an HDMI 2.0 (or better) cable. 3) Wide compatibility: Works with Dell XPS13/XPS15, Samsung Galaxy S9/S9+, and more. Not all USB-C laptops are compatible; this adapter requires a host USB-C port that supports video output (DP Alt Mode). If in doubt, check for the DP logo next to the port. 4) Plug and play: No driver installation needed. It operates as a DP Alt Mode USB-C device; dual-monitor output is powered through the USB-C connection, so no external power adapter is required. Setup tip: connect the monitor (HDMI) first, then the laptop (USB-C). You may need to set the default audio output in system preferences to deliver sound. 5) Use scenarios: - Home/office productivity: extend your desktop to two external monitors for multitasking and easy reference switching. - Gaming and entertainment: run a 4K display for immersive visuals while using the second HDMI display for chat, maps, or streaming content. - On-the-go presentations: connect to two external displays for meetings or demonstrations with supported devices.