DUAL-MONITOR ADAPTER: USB (Universal Serial Bus)-A 3.0 (5 Gbps) to HDMI & VGA external video adapter converter adds up to two additional displays; Supports HDMI 4K 30 Hz (3840x 2160) with 2ch audio & VGA 1080p (1920x 1080) 60 Hz CONVENIENT: External graphics card delivers easy & universal way to connect a single display, projector or HDTV, or add additional monitors to nearly any desktop/laptop w/ a USB (Universal Serial Bus) 3.0 (USB Type-A) port HOST COMPATIBILITY: Expand your existing workspace productivity with a multiple screen workstation at home or in the office; works w/ USB (Universal Serial Bus)-A computers incl Lenovo, Dell, HP, Microsoft Surface & Mac Book DRIVER & OS: Powered by Silicon Motion the adapter enables simultaneous use w/ USB (Universal Serial Bus) video/graphics devices powered by Display Link/MCT/ Fresco; Win 7/8/10 (auto driver install w/ Win 10), mac OS 10.13 & up INCREASE PRODUCTIVITY: Mirror/extend content on two additional monitors simultaneously w/ the 2-in-1 multiport adapter w/ HDMI & VGA; portable design is ideal to be used at your workstation or on the go