[USB rubbery ducky on ANDROID]

What is the Home Button on the keyboard for an Android Phone , which Combo do i need ?
 

[USB Rubbery Ducky on German Keyboard]

I have a Question , does the USB rubbery ducky works also on a German keyboard , maybe you know that the keyboard is diffrent as the english(US) one , so does it also types when i type for example "//" this letters in a german keyboard does he also run that command or does he orientate the US keyboard and write other letter then for example this "//". I hope you understand it , thanks for reply :D