A:AnswerYes! I used it with one. The only downside is you can't modify the RGB, you need a newer software to use the Razer Synapse RGB. Otherwise, it just cycles through random colors.
A:AnswerBoth aux/headphone 3.5mm jack and USB come on the left side of the keyboard. And yes you can plug a mouse into that port. Just make sure you connect both USB cables that come with the keyboard into the pc for them both to work! Great keyboard btw!
A:AnswerNot in store, no. The only place I'm aware that you can purchase any of Razer's keyboards with their other switches is directly from their site.
A:AnswerUnfortunatly the black widow elite isnt compatible with saving onboard profiles at the current point in time, even if u follow the steps to save the profiles, The keyboard isnt compatible with this side of the software.