Startup Sign in screen MacBook Pro – Strange option box says Home – Switch with options of Keyboard, Pointer, or Location. What is this?

When I restart my MacBook I get the sign in screen or the Startup Sign in screen and lately a small window I guess it would be Called is sitting on top with its own x to close out but it is a Strange option box that has a black back ground with white writing and it says Home – Switch with 3 options under that have a icon and one says Keyboard, middle one says Pointer, and last one says Location. What is this?