HDMI switch for Dummies

It would be these days as a lark, when one finds a simple device that is not patronized a. This small adapter connects two image sources with a screen or two screens with an image source. Is switched with a snap button, the only one person can operate. And the case is not made of plastic but metal (!). I use it for a simple screen with a resolution of 1900x1200 pixels (no sound, no 3D) and a total of 3m cable route.
The LEDs that indicate the HDMI port currently used are blue and garish and in the dark really annoying. I had to tape up with tape. There are however no downside.