Hi,my dear angel, welcome to Jacenvly, our products are cheap and good quality, price is fair, you can't miss it. If this product is not your style, please click on our store, we have many kinds of products, there will be you like and suits you. If you have any questions about your purchase, please send us the first message, we offer world class customer service to make your purchase without your worries. Have a nice day. USB 3.0 to Dual HDMI Adapter External Video Supports Windows - Feature: HIGH RESOLUTION SUPPORT: Add astonishing picture quality through the USB 3.0 port of your computer by adding support for video resolutions of up to 4K at 30Hz. NO POWER SUPPLY NEEDED: Connect the 4K UHD dual monitor adapter directly to your computer without the need for an additional power supply. WINDOWS ONLY: This USB 3.0 to Dual HDMI Adapter is Windows operating systems and does support -book devices. Specification： Support Windows 7 / 8 / 8.1/10, XP (32bit), (32bit), Support 1 USB input interface Support 1 channel 3.5mm stereo output Support 2 HDMI output interfaces Output resolution up to 1920x1080p 60Hz Supports USB3.0 and USB2.0 interfaces ：Metal Product size：60x15x175mm Package: 1X Adapter 1X Manual HIGH RESOLUTION SUPPORT: Add astonishing picture quality through the USB 3.0 port of your computer by adding support for video resolutions of up to 4K at 30Hz. NO POWER SUPPLY NEEDED: Connect the 4K UHD dual monitor adapter directly to your computer without the need for an additional power supply. WINDOWS ONLY: This USB 3.0 to Dual HDMI Adapter is Windows operating systems and does support -book devices. Specification： Support Windows 7 / 8 / 8.1/10, XP (32bit), (32bit), Support 1 USB input interface