New OEM Motorola Stereo Headset Model # SYN1603 Motorola Stereo Headsets allow private stereo music and hands-free phone calls. Plug directly into the phone. Headsets are compatible with all Motorola headset-compatible phones, non-Motorola phones and products that support a 2.5mm headset jack. Silver, 2.5mm Stereo Headset w/ On & Off button Compatible With: All products that support a 2.5mm headset jack. Comes with 3.5mm Headset Adapter to be used with any device which is 3.5mm Compatible