The Echelon 25XT packs additional comfort and performance features onto the solid Echelon platform. The 25XT includes Telex's innovative cell phone/MP3 adapter that allows you to attach both your cell phone and MP3 player at the same time. No more switching cords! Need to communicate? Simply mute them both at a touch of a button. For increased comfort, the Echelon 25XT features a plush, thick foam headband pad and newly designed, more comfortable ear cushions. The Echelon 25XT also offers individual volume controls for each ear cup and a stereo/mono select switch.