Poor monitor image quality with USB 2.0 VGA Display Adapter

USB 2.0 VGA display adapter hooked up to monitor HDMI HNC LCD Monitor Model No. HSG1081 Serial No. Q4DG28N-850-4AZA / and to ASUS TP200S notebook (Windows 10) monitor image quality poor / set resolution at 1366 x 768. Suggestions? Thanks.