Motorola SJYN0505A Original OEM 2.5mm PTT Stereo Wired Headset - Non-Retail Packaging - Black This Motorola Headset SJYN0505A plugs directly to your Motorola or Nextel phone. Are you looking for a simple Push-to-Talk stereo headset. The search is over. Part Numbers: SJYN0505/SJYN0505A