OEM Motorola Push to talk 2.5mm Stereo Headset SJYN0505A for iDen Nextel/Sprint phones The headset is specifically designed to fit Nextel phone models with built-in stereo output Option to mute music and operate in mono sound during a phone call. Sleek ear-bud design fits comfortably in outer ear In-line mic reduces background noise and increases the volume and clarity of your voice Molded in-line audio adapter eliminates static connections: PTT type walkie-talkie button can also initiate 2 way radio calls