the edifiers have vomume, bass and treble on the side of the speaker that has the amp in, and come suplied with a 2m cable that you would plug into the headphone socket on your phone, also have two inputs so with a second cable you could have say pc and phone both playing sound at the same time.
thay are very good for the price (even better when on special) have had a pair myself for over 3 years