About this item PERFORMANCE: USB 3.0 to Dual HDMI adapter lets you extend your desktop by adding up to two HDMI monitors to your laptop or desktop computer using a single USB Type-A port | 1x output for up to 4K 30Hz (UHD) & 1x 1080p | 2ch audio (through HDMI) | HDCP 1.4. Compatibility Options: Windows 10 logo, Windows 10 (32/64), Windows 8 / 8.1 (32/64), Windows 7(32/64). INCREASE PRODUCTIVITY: Supports a total of 3 displays in extended mode (incl. laptop screen) at your workstation or working remotely from home | USB bus-powered; no extra power supply required | 4K port supports ultrawide displays up to 2560x1080. EASY SETUP: 10" (25cm) attached cable for added distance between the adapter & host device for multi-monitor workspace or HDTV boardroom setup; Auto driver install; Works w/ Windows system even if 4K output is not natively supported by laptop/video card. WINDOWS ONLY: This USB-A to dual HDMI monitor adapter is only compatible with Windows operating systems and does not support macOS or Linux | External USB 3.0 (USB 3.1 Gen 1) Graphics Card Adapter to connect multiple screens.