SummitLink Replacement Remote for Logitech Z-5500 Z-680 Z-5400 Z-5450 Computer Speakers Works perfect on Logitech Z-5500 Computer Speaker System Also works on Logitech Z-5400 Z5400 Z-5450 Z 5450 Works Z-680 Z680 except for the 3 mode button (the buttons are for z-5500)