abut styles

hay
my keyboard is roland exr 7 and i have some qu
i wont to ask, whot is arranger keyboard ?
and ineed to no if ther any software thet convert psr styles to roland exr styles
and last way some styles theat fit to roland inst not fit to exr 7

thnks

Jambo7,
Am I understanding your question? You own a Roland EXR-7 and you want to know what is an arranger keyboard?
Your EXR-7 is an arranger keyboard.
Here's my definition: It is a keyboard with the ability to play accompaniment based on chords fed to it.
Starkeeper

i know that mk keyboart is arranger but i did know the mining .