coolcold 2 Port VGA Switch Press Button Two Way VGA Video Switcher Splitter for PC TV Media Streaming Device  (Black)

Depending on the size of the monitor, the resolution is not the same, the host can set only one resolution at the same time.After switching the monitor, you must replace the monitor resolution. For exemple, one monitor resolution of 1920 * 1080, and another is 1440 * 900, you must set the monitor resolution to 1920*1080 when you switch to the first monitor,and set the monitor resolution to 1440*900 when you switch to the second monitor.