? How to solve the problem if there is a lag of image on the screen ? ? 1. Connect a USB mouse and reboot the computer. 2. Make sure to plug into the USB 3.0 port, it will not work with USB 2.0 port. 3. Do not attach too many USB peripheral to your host device. ? HIGH PERFORMANCE? Built-in with FL2000DX chip for stable performance and long life; supports high resolution up to 1920x1080 P @ 60Hz, 1900 x1200 (1080P) over USB 3.0 (NOT recommend for USB 2.0), max working current: 300MA, transmission speed: 5.0Gbps. ?CONNECTIVITY ?ONLY Connect to USB 3.0 Port to get the best performance. Gold-plated USB 3.0 to VGA adapter cable supports USB 3.0 input and VGA output, providing a solution to connect your USB computer to a large-screen monitor, projector, and HDTV. A completely external device saves you the cost and hassle of upgrading the internal graphics card. ?DRIVER NEEDED? 1. Please search “paradetech” to enter official site, then click the"USB" and "USB Video" then click "FL2000 Windows Driver" to download. Use your Administrator's permission to install the driver. 2. You can also get the User’s Guidance on this page. ?COMPATIBILITY ?Display the image or video in Extend, Mirror, and Clone modes. ONLY SUPPORT operating system such as Windows 10 (32bit & 64bit), Windows 8.1 / 8 (32bit & 64bit), Windows 7, macOS. NOTE: NOT compatible with Linux, Windows Vista /XP, Android, PS3, PS4, Xbox, Chromebook, etc.