Motorola original stereo headset adapter (SKN6183) allows for connection of a 2.5mm device to any 3.5mm headset. Adapter plugs into the headset port of any standard 2.5 mm phone and allows connection of any 3.5 mm headset. This allows you to use headsets designed for the iPod and other stereo devices with your 2.5mm mobile phone. This adapter does not transfer microphone input so it should be used for listening to audio only.