The IOGEAR USB 3.0 HDMI External Video Card instantly enables you to connect a high resolution HDMI display through your computer's USB 3.0 port. Extend your desktop to watch HD quality videos on your flat panel TV, or increase productivity in your office environment with this HDMI video card. It mirrors or extends your desktop across an additional HDMI display, enabling multitasking with ease. Increase your work space by adding a second monitor. Graphics programs benefit from putting all your pallets on the second display, large spreadsheets can be stretched across both screens for easier viewing, or watch HD movies on one display, while reading your email on the other. No power supply is needed as the USB 3.0 to HDMI External Video Card is powered through the USB cable.