USB-A TO VGA ADAPTER: Connect a VGA monitor or projector to the USB 2.0 port of your computer or laptop. Use up to 6 adapters to for a total of 7 displays on Windows, and up to 4 adapters for 5 total displays on Mac. HIGH DEFINITION VIDEO: Supports HD video resolutions up to 1920 x 1200 @ 60 Hz (1080p) @ 60 Hz refresh rate. WIDE RANGE COMPATIBILITY: Compatible with 32-ibt and 64-bit Windows 2000 and later, 32-bit and 64-bit Intel Mac OS X 10.4 and later, and Ubuntu 14.04.2. This adapter also works with Surface tablets running Windows 8 Pro or later. EASY TO USE: Completely plug-and-play with no software or drivers to install or external power supply needed. Small size and built-in cable is perfect for stowing in your laptop bag. RELIABLE PRODUCT FULLY BACKED AND SUPPORTED: This product is covered by a 3-Year Limited Warranty and is supported by Tripp Lite's Chicago-based expert technical support team over phone and email.