Sound switch Adapter For SONY Walkman WM-FX5 EX615 EX621 EX631 EX678 EX900 EX910

Sound switch Adapter For SONY Walkman WM-FX5 EX615 EX621 EX631 EX678 EX900 EX910 This is a sound effect switch adapter, you can think of it as the "SOUND" function on the remote control. We just made an adapter separately. This makes it conveni...